Vulnerability-Lookup

usn-8516-1

Vulnerability from osv_ubuntu

Published

2026-07-08 13:49

Modified

2026-07-08 13:49

Summary

apache2 vulnerabilities

Details

It was discovered that Apache HTTP Server's mod_ldap module incorrectly handled memory when processing per-directory configurations. An attacker could use this issue to cause the server to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-29167)

It was discovered that Apache HTTP Server's mod_proxy_ftp module incorrectly handled HTML generation for FTP directory listings. A remote attacker could possibly use this issue to inject arbitrary web script or HTML. (CVE-2026-29170)

It was discovered that Apache HTTP Server's mod_proxy_html module incorrectly handled certain content from an untrusted backend. A remote attacker could possibly use this issue to cause Apache HTTP Server to crash, resulting in a denial of service. (CVE-2026-34355)

It was discovered that Apache HTTP Server incorrectly handled ProxyPassReverseCookie directives with a malicious backend server. A remote attacker could possibly use this issue to cause Apache HTTP Server to crash, resulting in a denial of service. (CVE-2026-34356)

It was discovered that Apache HTTP Server's mod_dav_fs module incorrectly handled certain path operations. An authenticated user could possibly use this issue to manipulate trusted WebDAV property databases or cause a denial of service. (CVE-2026-42535)

It was discovered that Apache HTTP Server's mod_xml2enc module incorrectly handled certain content from an untrusted backend. A remote attacker could possibly use this issue to cause Apache HTTP Server to crash, resulting in a denial of service. (CVE-2026-42536)

It was discovered that Apache HTTP Server incorrectly handled response headers when multiple content languages were configured. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-43951)

It was discovered that Apache HTTP Server incorrectly restricted certain file functions in expressions within .htaccess files. A local attacker with .htaccess write access could possibly use this issue to obtain sensitive information. (CVE-2026-44119)

It was discovered that Apache HTTP Server's mod_ssl module incorrectly handled OCSP responses from an attacker-controlled server. A remote attacker could possibly use this issue to obtain sensitive information or cause a denial of service. (CVE-2026-44185)

It was discovered that Apache HTTP Server's mod_proxy_ftp module incorrectly handled responses from an attacker-controlled backend FTP server. A remote attacker could possibly use this issue to cause Apache HTTP Server to stop responding, resulting in a denial of service. (CVE-2026-44186)

It was discovered that Apache HTTP Server incorrectly handled crafted regular expressions in the server configuration. An attacker could possibly use this issue to execute arbitrary code or cause a denial of service. (CVE-2026-44631)

It was discovered that Apache HTTP Server's mod_http2 module had a use-after-free vulnerability when file handles were exhausted. A remote attacker could possibly use this issue to cause Apache HTTP Server to crash, resulting in a denial of service. (CVE-2026-48913)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8516-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-29167	REPORT
	https://ubuntu.com/security/CVE-2026-29170	REPORT
	https://ubuntu.com/security/CVE-2026-34355	REPORT
	https://ubuntu.com/security/CVE-2026-34356	REPORT
	https://ubuntu.com/security/CVE-2026-42535	REPORT
	https://ubuntu.com/security/CVE-2026-42536	REPORT
	https://ubuntu.com/security/CVE-2026-43951	REPORT
	https://ubuntu.com/security/CVE-2026-44119	REPORT
	https://ubuntu.com/security/CVE-2026-44185	REPORT
	https://ubuntu.com/security/CVE-2026-44186	REPORT
	https://ubuntu.com/security/CVE-2026-44631	REPORT
	https://ubuntu.com/security/CVE-2026-48913	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-29167",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-29170",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-34355",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-34356",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-42535",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-42536",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43951",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44185",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44186",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44631",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48913",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.52-1ubuntu4.23"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.52-1ubuntu4.23?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.52-1ubuntu4.23"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.48-3.1ubuntu3",
        "2.4.48-3.1ubuntu4",
        "2.4.51-2ubuntu1",
        "2.4.52-1ubuntu1",
        "2.4.52-1ubuntu2",
        "2.4.52-1ubuntu4",
        "2.4.52-1ubuntu4.1",
        "2.4.52-1ubuntu4.2",
        "2.4.52-1ubuntu4.3",
        "2.4.52-1ubuntu4.4",
        "2.4.52-1ubuntu4.5",
        "2.4.52-1ubuntu4.6",
        "2.4.52-1ubuntu4.7",
        "2.4.52-1ubuntu4.8",
        "2.4.52-1ubuntu4.9",
        "2.4.52-1ubuntu4.10",
        "2.4.52-1ubuntu4.11",
        "2.4.52-1ubuntu4.12",
        "2.4.52-1ubuntu4.13",
        "2.4.52-1ubuntu4.14",
        "2.4.52-1ubuntu4.15",
        "2.4.52-1ubuntu4.16",
        "2.4.52-1ubuntu4.18",
        "2.4.52-1ubuntu4.19",
        "2.4.52-1ubuntu4.20",
        "2.4.52-1ubuntu4.21"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-29167",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-29170",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-34355",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-34356",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-42535",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-42536",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43951",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44185",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44186",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44631",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48913",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.58-1ubuntu8.15"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.58-1ubuntu8.15?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.58-1ubuntu8.15"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.57-2ubuntu2",
        "2.4.57-2ubuntu3",
        "2.4.58-1ubuntu1",
        "2.4.58-1ubuntu2",
        "2.4.58-1ubuntu6",
        "2.4.58-1ubuntu7",
        "2.4.58-1ubuntu8",
        "2.4.58-1ubuntu8.1",
        "2.4.58-1ubuntu8.2",
        "2.4.58-1ubuntu8.3",
        "2.4.58-1ubuntu8.4",
        "2.4.58-1ubuntu8.5",
        "2.4.58-1ubuntu8.6",
        "2.4.58-1ubuntu8.7",
        "2.4.58-1ubuntu8.8",
        "2.4.58-1ubuntu8.10",
        "2.4.58-1ubuntu8.11",
        "2.4.58-1ubuntu8.12",
        "2.4.58-1ubuntu8.13"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-29167",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-29170",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-34355",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-34356",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-42535",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-42536",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-43951",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44119",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44185",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44186",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-44631",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-48913",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.66-2ubuntu2.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.66-2ubuntu2.4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.66-2ubuntu2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.64-1ubuntu3",
        "2.4.65-3ubuntu1",
        "2.4.66-2ubuntu1",
        "2.4.66-2ubuntu2",
        "2.4.66-2ubuntu2.1",
        "2.4.66-2ubuntu2.2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Apache HTTP Server\u0027s mod_ldap module incorrectly\nhandled memory when processing per-directory configurations. An attacker\ncould use this issue to cause the server to crash, resulting in a denial of\nservice, or possibly execute arbitrary code. (CVE-2026-29167)\n\nIt was discovered that Apache HTTP Server\u0027s mod_proxy_ftp module\nincorrectly handled HTML generation for FTP directory listings. A remote\nattacker could possibly use this issue to inject arbitrary web script or\nHTML. (CVE-2026-29170)\n\nIt was discovered that Apache HTTP Server\u0027s mod_proxy_html module\nincorrectly handled certain content from an untrusted backend. A remote\nattacker could possibly use this issue to cause Apache HTTP Server to\ncrash, resulting in a denial of service. (CVE-2026-34355)\n\nIt was discovered that Apache HTTP Server incorrectly handled\nProxyPassReverseCookie directives with a malicious backend server. A remote\nattacker could possibly use this issue to cause Apache HTTP Server to\ncrash, resulting in a denial of service. (CVE-2026-34356)\n\nIt was discovered that Apache HTTP Server\u0027s mod_dav_fs module incorrectly\nhandled certain path operations. An authenticated user could possibly use\nthis issue to manipulate trusted WebDAV property databases or cause a\ndenial of service. (CVE-2026-42535)\n\nIt was discovered that Apache HTTP Server\u0027s mod_xml2enc module incorrectly\nhandled certain content from an untrusted backend. A remote attacker could\npossibly use this issue to cause Apache HTTP Server to crash, resulting in\na denial of service. (CVE-2026-42536)\n\nIt was discovered that Apache HTTP Server incorrectly handled response\nheaders when multiple content languages were configured. A remote attacker\ncould possibly use this issue to obtain sensitive information.\n(CVE-2026-43951)\n\nIt was discovered that Apache HTTP Server incorrectly restricted certain\nfile functions in expressions within .htaccess files. A local attacker with\n.htaccess write access could possibly use this issue to obtain sensitive\ninformation. (CVE-2026-44119)\n\nIt was discovered that Apache HTTP Server\u0027s mod_ssl module incorrectly\nhandled OCSP responses from an attacker-controlled server. A remote\nattacker could possibly use this issue to obtain sensitive information or\ncause a denial of service. (CVE-2026-44185)\n\nIt was discovered that Apache HTTP Server\u0027s mod_proxy_ftp module\nincorrectly handled responses from an attacker-controlled backend FTP\nserver. A remote attacker could possibly use this issue to cause Apache\nHTTP Server to stop responding, resulting in a denial of service.\n(CVE-2026-44186)\n\nIt was discovered that Apache HTTP Server incorrectly handled crafted\nregular expressions in the server configuration. An attacker could possibly\nuse this issue to execute arbitrary code or cause a denial of service.\n(CVE-2026-44631)\n\nIt was discovered that Apache HTTP Server\u0027s mod_http2 module had a\nuse-after-free vulnerability when file handles were exhausted. A remote\nattacker could possibly use this issue to cause Apache HTTP Server to\ncrash, resulting in a denial of service. (CVE-2026-48913)",
  "id": "USN-8516-1",
  "modified": "2026-07-08T13:49:49Z",
  "published": "2026-07-08T13:49:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8516-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-29167"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-29170"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-34355"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-34356"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-42535"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-42536"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43951"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44119"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44185"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44186"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44631"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-48913"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "apache2 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-29167",
    "UBUNTU-CVE-2026-29170",
    "UBUNTU-CVE-2026-34355",
    "UBUNTU-CVE-2026-34356",
    "UBUNTU-CVE-2026-42535",
    "UBUNTU-CVE-2026-42536",
    "UBUNTU-CVE-2026-43951",
    "UBUNTU-CVE-2026-44119",
    "UBUNTU-CVE-2026-44185",
    "UBUNTU-CVE-2026-44186",
    "UBUNTU-CVE-2026-44631",
    "UBUNTU-CVE-2026-48913"
  ]
}

ubuntu-cve-2026-44631

Vulnerability from osv_ubuntu

Published

2026-06-08 16:16

Modified

2026-07-21 10:41

Summary

Details

Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.

Severity

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-44631	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-44631	REPORT
	https://httpd.apache.org/security/vulnerabilities…	REPORT
	https://httpd.apache.org/security/vulnerabilities…	REPORT
	http://www.openwall.com/lists/oss-security/2026/0…	REPORT
	https://ubuntu.com/security/notices/USN-8516-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8571-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.18-2ubuntu3.17+esm19"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.18-2ubuntu3.17+esm19"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.18-2ubuntu3.17+esm19"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.18-2ubuntu3.17+esm19"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.18-2ubuntu3.17+esm19"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.18-2ubuntu3.17+esm19"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.18-2ubuntu3.17+esm19?arch=source\u0026distro=esm-infra-legacy/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.18-2ubuntu3.17+esm19"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.12-2ubuntu2",
        "2.4.17-1ubuntu1",
        "2.4.17-2ubuntu1",
        "2.4.17-3ubuntu1",
        "2.4.18-1ubuntu1",
        "2.4.18-2ubuntu1",
        "2.4.18-2ubuntu2",
        "2.4.18-2ubuntu3",
        "2.4.18-2ubuntu3.1",
        "2.4.18-2ubuntu3.2",
        "2.4.18-2ubuntu3.3",
        "2.4.18-2ubuntu3.4",
        "2.4.18-2ubuntu3.5",
        "2.4.18-2ubuntu3.7",
        "2.4.18-2ubuntu3.8",
        "2.4.18-2ubuntu3.9",
        "2.4.18-2ubuntu3.10",
        "2.4.18-2ubuntu3.12",
        "2.4.18-2ubuntu3.13",
        "2.4.18-2ubuntu3.14",
        "2.4.18-2ubuntu3.15",
        "2.4.18-2ubuntu3.17",
        "2.4.18-2ubuntu3.17+esm1",
        "2.4.18-2ubuntu3.17+esm2",
        "2.4.18-2ubuntu3.17+esm3",
        "2.4.18-2ubuntu3.17+esm4",
        "2.4.18-2ubuntu3.17+esm5",
        "2.4.18-2ubuntu3.17+esm6",
        "2.4.18-2ubuntu3.17+esm7",
        "2.4.18-2ubuntu3.17+esm8",
        "2.4.18-2ubuntu3.17+esm9",
        "2.4.18-2ubuntu3.17+esm10",
        "2.4.18-2ubuntu3.17+esm11",
        "2.4.18-2ubuntu3.17+esm12",
        "2.4.18-2ubuntu3.17+esm13",
        "2.4.18-2ubuntu3.17+esm14",
        "2.4.18-2ubuntu3.17+esm16",
        "2.4.18-2ubuntu3.17+esm17",
        "2.4.18-2ubuntu3.17+esm18"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.29-1ubuntu4.27+esm10"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.29-1ubuntu4.27+esm10"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.29-1ubuntu4.27+esm10"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.29-1ubuntu4.27+esm10"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.29-1ubuntu4.27+esm10"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.29-1ubuntu4.27+esm10"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.29-1ubuntu4.27+esm10?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.29-1ubuntu4.27+esm10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.27-2ubuntu3",
        "2.4.29-1ubuntu1",
        "2.4.29-1ubuntu2",
        "2.4.29-1ubuntu3",
        "2.4.29-1ubuntu4",
        "2.4.29-1ubuntu4.1",
        "2.4.29-1ubuntu4.2",
        "2.4.29-1ubuntu4.3",
        "2.4.29-1ubuntu4.4",
        "2.4.29-1ubuntu4.5",
        "2.4.29-1ubuntu4.6",
        "2.4.29-1ubuntu4.7",
        "2.4.29-1ubuntu4.8",
        "2.4.29-1ubuntu4.10",
        "2.4.29-1ubuntu4.11",
        "2.4.29-1ubuntu4.12",
        "2.4.29-1ubuntu4.13",
        "2.4.29-1ubuntu4.14",
        "2.4.29-1ubuntu4.16",
        "2.4.29-1ubuntu4.17",
        "2.4.29-1ubuntu4.18",
        "2.4.29-1ubuntu4.19",
        "2.4.29-1ubuntu4.20",
        "2.4.29-1ubuntu4.21",
        "2.4.29-1ubuntu4.22",
        "2.4.29-1ubuntu4.23",
        "2.4.29-1ubuntu4.24",
        "2.4.29-1ubuntu4.25",
        "2.4.29-1ubuntu4.26",
        "2.4.29-1ubuntu4.27",
        "2.4.29-1ubuntu4.27+esm1",
        "2.4.29-1ubuntu4.27+esm2",
        "2.4.29-1ubuntu4.27+esm3",
        "2.4.29-1ubuntu4.27+esm4",
        "2.4.29-1ubuntu4.27+esm6",
        "2.4.29-1ubuntu4.27+esm7",
        "2.4.29-1ubuntu4.27+esm8",
        "2.4.29-1ubuntu4.27+esm9"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.41-4ubuntu3.23+esm5?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.41-4ubuntu3.23+esm5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.41-1ubuntu1",
        "2.4.41-4ubuntu1",
        "2.4.41-4ubuntu2",
        "2.4.41-4ubuntu3",
        "2.4.41-4ubuntu3.1",
        "2.4.41-4ubuntu3.3",
        "2.4.41-4ubuntu3.4",
        "2.4.41-4ubuntu3.5",
        "2.4.41-4ubuntu3.6",
        "2.4.41-4ubuntu3.7",
        "2.4.41-4ubuntu3.8",
        "2.4.41-4ubuntu3.9",
        "2.4.41-4ubuntu3.10",
        "2.4.41-4ubuntu3.11",
        "2.4.41-4ubuntu3.12",
        "2.4.41-4ubuntu3.13",
        "2.4.41-4ubuntu3.14",
        "2.4.41-4ubuntu3.15",
        "2.4.41-4ubuntu3.16",
        "2.4.41-4ubuntu3.17",
        "2.4.41-4ubuntu3.19",
        "2.4.41-4ubuntu3.20",
        "2.4.41-4ubuntu3.21",
        "2.4.41-4ubuntu3.23",
        "2.4.41-4ubuntu3.23+esm2",
        "2.4.41-4ubuntu3.23+esm3",
        "2.4.41-4ubuntu3.23+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.52-1ubuntu4.23"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.52-1ubuntu4.23?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.52-1ubuntu4.23"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.48-3.1ubuntu3",
        "2.4.48-3.1ubuntu4",
        "2.4.51-2ubuntu1",
        "2.4.52-1ubuntu1",
        "2.4.52-1ubuntu2",
        "2.4.52-1ubuntu4",
        "2.4.52-1ubuntu4.1",
        "2.4.52-1ubuntu4.2",
        "2.4.52-1ubuntu4.3",
        "2.4.52-1ubuntu4.4",
        "2.4.52-1ubuntu4.5",
        "2.4.52-1ubuntu4.6",
        "2.4.52-1ubuntu4.7",
        "2.4.52-1ubuntu4.8",
        "2.4.52-1ubuntu4.9",
        "2.4.52-1ubuntu4.10",
        "2.4.52-1ubuntu4.11",
        "2.4.52-1ubuntu4.12",
        "2.4.52-1ubuntu4.13",
        "2.4.52-1ubuntu4.14",
        "2.4.52-1ubuntu4.15",
        "2.4.52-1ubuntu4.16",
        "2.4.52-1ubuntu4.18",
        "2.4.52-1ubuntu4.19",
        "2.4.52-1ubuntu4.20",
        "2.4.52-1ubuntu4.21"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.58-1ubuntu8.15"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.58-1ubuntu8.15?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.58-1ubuntu8.15"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.57-2ubuntu2",
        "2.4.57-2ubuntu3",
        "2.4.58-1ubuntu1",
        "2.4.58-1ubuntu2",
        "2.4.58-1ubuntu6",
        "2.4.58-1ubuntu7",
        "2.4.58-1ubuntu8",
        "2.4.58-1ubuntu8.1",
        "2.4.58-1ubuntu8.2",
        "2.4.58-1ubuntu8.3",
        "2.4.58-1ubuntu8.4",
        "2.4.58-1ubuntu8.5",
        "2.4.58-1ubuntu8.6",
        "2.4.58-1ubuntu8.7",
        "2.4.58-1ubuntu8.8",
        "2.4.58-1ubuntu8.10",
        "2.4.58-1ubuntu8.11",
        "2.4.58-1ubuntu8.12",
        "2.4.58-1ubuntu8.13"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.64-1ubuntu3.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.64-1ubuntu3.5?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.63-1ubuntu1",
        "2.4.63-1ubuntu3",
        "2.4.64-1ubuntu2",
        "2.4.64-1ubuntu3",
        "2.4.64-1ubuntu3.2",
        "2.4.64-1ubuntu3.3",
        "2.4.64-1ubuntu3.4",
        "2.4.64-1ubuntu3.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.66-2ubuntu2.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.66-2ubuntu2.4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.66-2ubuntu2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.64-1ubuntu3",
        "2.4.65-3ubuntu1",
        "2.4.66-2ubuntu1",
        "2.4.66-2ubuntu2",
        "2.4.66-2ubuntu2.1",
        "2.4.66-2ubuntu2.2"
      ]
    }
  ],
  "aliases": [],
  "details": "Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67. Users are recommended to upgrade to version 2.4.68, which fixes the issue.",
  "id": "UBUNTU-CVE-2026-44631",
  "modified": "2026-07-21T10:41:50Z",
  "published": "2026-06-08T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-44631"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-44631"
    },
    {
      "type": "REPORT",
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2026-44631"
    },
    {
      "type": "REPORT",
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/08/14"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8516-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8571-1"
    }
  ],
  "related": [
    "USN-8516-1",
    "USN-8571-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-44631"
  ]
}

ubuntu-cve-2026-48913

Vulnerability from osv_ubuntu

Published

2026-06-08 16:16

Modified

2026-07-22 18:39

Summary

Details

Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.67.

Severity

7.3 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-48913	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-48913	REPORT
	https://httpd.apache.org/security/vulnerabilities…	REPORT
	https://httpd.apache.org/security/vulnerabilities…	REPORT
	http://www.openwall.com/lists/oss-security/2026/0…	REPORT
	https://ubuntu.com/security/notices/USN-8516-1	ADVISORY
	https://ubuntu.com/security/notices/USN-8571-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.29-1ubuntu4.27+esm11"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.29-1ubuntu4.27+esm11"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.29-1ubuntu4.27+esm11"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.29-1ubuntu4.27+esm11"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.29-1ubuntu4.27+esm11"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.29-1ubuntu4.27+esm11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.29-1ubuntu4.27+esm11?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.27-2ubuntu3",
        "2.4.29-1ubuntu1",
        "2.4.29-1ubuntu2",
        "2.4.29-1ubuntu3",
        "2.4.29-1ubuntu4",
        "2.4.29-1ubuntu4.1",
        "2.4.29-1ubuntu4.2",
        "2.4.29-1ubuntu4.3",
        "2.4.29-1ubuntu4.4",
        "2.4.29-1ubuntu4.5",
        "2.4.29-1ubuntu4.6",
        "2.4.29-1ubuntu4.7",
        "2.4.29-1ubuntu4.8",
        "2.4.29-1ubuntu4.10",
        "2.4.29-1ubuntu4.11",
        "2.4.29-1ubuntu4.12",
        "2.4.29-1ubuntu4.13",
        "2.4.29-1ubuntu4.14",
        "2.4.29-1ubuntu4.16",
        "2.4.29-1ubuntu4.17",
        "2.4.29-1ubuntu4.18",
        "2.4.29-1ubuntu4.19",
        "2.4.29-1ubuntu4.20",
        "2.4.29-1ubuntu4.21",
        "2.4.29-1ubuntu4.22",
        "2.4.29-1ubuntu4.23",
        "2.4.29-1ubuntu4.24",
        "2.4.29-1ubuntu4.25",
        "2.4.29-1ubuntu4.26",
        "2.4.29-1ubuntu4.27",
        "2.4.29-1ubuntu4.27+esm1",
        "2.4.29-1ubuntu4.27+esm2",
        "2.4.29-1ubuntu4.27+esm3",
        "2.4.29-1ubuntu4.27+esm4",
        "2.4.29-1ubuntu4.27+esm6",
        "2.4.29-1ubuntu4.27+esm7",
        "2.4.29-1ubuntu4.27+esm8",
        "2.4.29-1ubuntu4.27+esm9",
        "2.4.29-1ubuntu4.27+esm10",
        "2.4.29-1ubuntu4.27+esm11"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.41-4ubuntu3.23+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.41-4ubuntu3.23+esm5?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.41-4ubuntu3.23+esm5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.41-1ubuntu1",
        "2.4.41-4ubuntu1",
        "2.4.41-4ubuntu2",
        "2.4.41-4ubuntu3",
        "2.4.41-4ubuntu3.1",
        "2.4.41-4ubuntu3.3",
        "2.4.41-4ubuntu3.4",
        "2.4.41-4ubuntu3.5",
        "2.4.41-4ubuntu3.6",
        "2.4.41-4ubuntu3.7",
        "2.4.41-4ubuntu3.8",
        "2.4.41-4ubuntu3.9",
        "2.4.41-4ubuntu3.10",
        "2.4.41-4ubuntu3.11",
        "2.4.41-4ubuntu3.12",
        "2.4.41-4ubuntu3.13",
        "2.4.41-4ubuntu3.14",
        "2.4.41-4ubuntu3.15",
        "2.4.41-4ubuntu3.16",
        "2.4.41-4ubuntu3.17",
        "2.4.41-4ubuntu3.19",
        "2.4.41-4ubuntu3.20",
        "2.4.41-4ubuntu3.21",
        "2.4.41-4ubuntu3.23",
        "2.4.41-4ubuntu3.23+esm2",
        "2.4.41-4ubuntu3.23+esm3",
        "2.4.41-4ubuntu3.23+esm4"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.52-1ubuntu4.23"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.52-1ubuntu4.23"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.52-1ubuntu4.23?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.52-1ubuntu4.23"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.48-3.1ubuntu3",
        "2.4.48-3.1ubuntu4",
        "2.4.51-2ubuntu1",
        "2.4.52-1ubuntu1",
        "2.4.52-1ubuntu2",
        "2.4.52-1ubuntu4",
        "2.4.52-1ubuntu4.1",
        "2.4.52-1ubuntu4.2",
        "2.4.52-1ubuntu4.3",
        "2.4.52-1ubuntu4.4",
        "2.4.52-1ubuntu4.5",
        "2.4.52-1ubuntu4.6",
        "2.4.52-1ubuntu4.7",
        "2.4.52-1ubuntu4.8",
        "2.4.52-1ubuntu4.9",
        "2.4.52-1ubuntu4.10",
        "2.4.52-1ubuntu4.11",
        "2.4.52-1ubuntu4.12",
        "2.4.52-1ubuntu4.13",
        "2.4.52-1ubuntu4.14",
        "2.4.52-1ubuntu4.15",
        "2.4.52-1ubuntu4.16",
        "2.4.52-1ubuntu4.18",
        "2.4.52-1ubuntu4.19",
        "2.4.52-1ubuntu4.20",
        "2.4.52-1ubuntu4.21"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "libapache2-mod-md",
            "binary_version": "2.4.58-1ubuntu8.15"
          },
          {
            "binary_name": "libapache2-mod-proxy-uwsgi",
            "binary_version": "2.4.58-1ubuntu8.15"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.58-1ubuntu8.15?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.58-1ubuntu8.15"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.57-2ubuntu2",
        "2.4.57-2ubuntu3",
        "2.4.58-1ubuntu1",
        "2.4.58-1ubuntu2",
        "2.4.58-1ubuntu6",
        "2.4.58-1ubuntu7",
        "2.4.58-1ubuntu8",
        "2.4.58-1ubuntu8.1",
        "2.4.58-1ubuntu8.2",
        "2.4.58-1ubuntu8.3",
        "2.4.58-1ubuntu8.4",
        "2.4.58-1ubuntu8.5",
        "2.4.58-1ubuntu8.6",
        "2.4.58-1ubuntu8.7",
        "2.4.58-1ubuntu8.8",
        "2.4.58-1ubuntu8.10",
        "2.4.58-1ubuntu8.11",
        "2.4.58-1ubuntu8.12",
        "2.4.58-1ubuntu8.13"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.64-1ubuntu3.5"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.64-1ubuntu3.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.64-1ubuntu3.5?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.63-1ubuntu1",
        "2.4.63-1ubuntu3",
        "2.4.64-1ubuntu2",
        "2.4.64-1ubuntu3",
        "2.4.64-1ubuntu3.2",
        "2.4.64-1ubuntu3.3",
        "2.4.64-1ubuntu3.4",
        "2.4.64-1ubuntu3.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "apache2",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-bin",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-data",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-suexec-custom",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-suexec-pristine",
            "binary_version": "2.4.66-2ubuntu2.4"
          },
          {
            "binary_name": "apache2-utils",
            "binary_version": "2.4.66-2ubuntu2.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "apache2",
        "purl": "pkg:deb/ubuntu/apache2@2.4.66-2ubuntu2.4?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.66-2ubuntu2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.64-1ubuntu3",
        "2.4.65-3ubuntu1",
        "2.4.66-2ubuntu1",
        "2.4.66-2ubuntu2",
        "2.4.66-2ubuntu2.1",
        "2.4.66-2ubuntu2.2"
      ]
    }
  ],
  "aliases": [],
  "details": "Use After Free vulnerability in Apache HTTP Server module mod_http2 when file handles are already exhausted. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.67.",
  "id": "UBUNTU-CVE-2026-48913",
  "modified": "2026-07-22T18:39:56Z",
  "published": "2026-06-08T16:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-48913"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-48913"
    },
    {
      "type": "REPORT",
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2026-48913"
    },
    {
      "type": "REPORT",
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/08/15"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8516-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8571-1"
    }
  ],
  "related": [
    "USN-8516-1",
    "USN-8571-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-48913"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

usn-8516-1

Vulnerability from osv_ubuntu

ubuntu-cve-2026-44631

Vulnerability from osv_ubuntu

ubuntu-cve-2026-48913

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature