Vulnerability-Lookup

CVE-2026-34032 (GCVE-0-2026-34032)

Vulnerability from cvelistv5 – Published: 2026-05-04 12:54 – Updated: 2026-05-04 17:32

Title

Apache HTTP Server: mod_proxy_ajp: Heap Buffer Over-Read Due to Missing Null-Termination Check (ajp_msg_get_string)

Summary

Improper Null Termination, Out-of-bounds Read vulnerability in Apache HTTP Server. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.

Severity

5.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-04 14:05 UTC

CWE

CWE-170 - Improper Null Termination
CWE-125 - Out-of-bounds Read

Assigner

apache mitre root

References

2 references

URL	Tags
https://httpd.apache.org/security/vulnerabilities…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version	CPE status
Apache Software Foundation	Apache HTTP Server	Affected: 0 , ≤ 2.4.66 (semver)	guessed

Credits

Tianshuo Han (<hantianshuo233@gmail.com>) Jérôme Djouder

Show details on NVD website

JSON

To clipboard

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RHSA-2026:36846

Vulnerability from csaf_redhat - Published: 2026-07-08 19:33 - Updated: 2026-09-14 05:28

Summary

Red Hat Security Advisory: httpd:2.4 security update

Severity

Important

Scope

7 vulnerabilities in this advisory, including CVE-2026-34032.

CVE-2026-34032

A flaw was found in the mod_proxy_ajp module of httpd. When processing AJP (Apache JServ Protocol) messages, the server fails to properly check if a string is null-terminated before attempting to read it, allowing an attacker or a malformed request to cause a heap-based buffer over-read. This issue potentially leads to memory disclosure and a denial of service.

8.2 (High)


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

Fixed: 50 products

https://access.redhat.com/errata/RHSA-2026:36846

Open the full advisory

RHSA-2026:47046

Vulnerability from csaf_redhat - Published: 2026-07-28 09:07 - Updated: 2026-09-18 17:44

Summary

Red Hat Security Advisory: httpd security update

Severity

Important

Scope

12 vulnerabilities in this advisory, including CVE-2026-34032.

CVE-2026-34032

8.2 (High)


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

Fixed: 75 products

https://access.redhat.com/errata/RHSA-2026:47046

Open the full advisory

RHSA-2026:66323

Vulnerability from csaf_redhat - Published: 2026-09-10 06:09 - Updated: 2026-09-18 17:44

Summary

Red Hat Security Advisory: httpd security update

Severity

Important

Scope

15 vulnerabilities in this advisory, including CVE-2026-34032.

CVE-2026-34032

8.2 (High)


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

Fixed: 5 products Known not affected: 70 products

https://access.redhat.com/errata/RHSA-2026:66323

Open the full advisory

RHSA-2026:67152

Vulnerability from csaf_redhat - Published: 2026-09-14 05:09 - Updated: 2026-09-18 17:44

Summary

Red Hat Security Advisory: httpd security update

Severity

Important

Scope

15 vulnerabilities in this advisory, including CVE-2026-34032.

CVE-2026-34032

8.2 (High)


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

Fixed: 5 products Known not affected: 70 products

https://access.redhat.com/errata/RHSA-2026:67152

Open the full advisory

RHSA-2026:62165

Vulnerability from csaf_opensuse - Published: 2026-09-01 17:54 - Updated: 2026-09-18 17:44

Summary

Red Hat Security Advisory: httpd security update

Severity

Important

Scope

15 vulnerabilities in this advisory, including CVE-2026-34032.

CVE-2026-34032

8.2 (High)


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

Fixed: 75 products

https://access.redhat.com/errata/RHSA-2026:62165

Open the full advisory

RLSA-2026:21391 (CVE-2026-28780)

Vulnerability from osv_rocky – Published: 2026-05-30 18:03 – Updated: 2026-06-13 18:05 – Source website

Summary

Important: httpd security update

Details

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data() (CVE-2026-34059)
httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check (CVE-2026-34032)
httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions (CVE-2026-33857)
httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash (CVE-2026-33007)
Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow (CVE-2026-28780)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

8.2 (High)


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

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:21391	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2464940	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2464952	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2464953	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2465299	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2466913	REPORT

JSON

To clipboard

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        "ecosystem": "Rocky Linux:9",
        "name": "httpd",
        "purl": "pkg:rpm/rocky-linux/httpd?distro=rocky-linux-9\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "AppStream"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:2.4.62-13.el9_8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.\n\nSecurity Fix(es):\n\n* httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data() (CVE-2026-34059)\n\n* httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check (CVE-2026-34032)\n\n* httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions (CVE-2026-33857)\n\n* httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash (CVE-2026-33007)\n\n* Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow (CVE-2026-28780)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:21391",
  "modified": "2026-06-13T18:05:49.010752Z",
  "published": "2026-05-30T18:03:01.190443Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:21391"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464940"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464952"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464953"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465299"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466913"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: httpd security update",
  "upstream": [
    "CVE-2026-28780",
    "CVE-2026-33007",
    "CVE-2026-33857",
    "CVE-2026-34032",
    "CVE-2026-34059"
  ]
}

RLSA-2026:21433 (CVE-2026-28780)

Vulnerability from osv_rocky – Published: 2026-06-04 12:04 – Updated: 2026-06-18 12:06 – Source website

Summary

Important: httpd security update

Details

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data() (CVE-2026-34059)
httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check (CVE-2026-34032)
httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions (CVE-2026-33857)
httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash (CVE-2026-33007)
Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow (CVE-2026-28780)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

8.2 (High)


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

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:21433	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2464940	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2464953	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2466913	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2464952	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2465299	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:10",
        "name": "httpd",
        "purl": "pkg:rpm/rocky-linux/httpd?distro=rocky-linux-10\u0026epoch=0"
      },
      "ranges": [
        {
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            "yum_repository": "AppStream"
          },
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            },
            {
              "fixed": "0:2.4.63-13.el10_2.1"
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          "type": "ECOSYSTEM"
        }
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    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.\n\nSecurity Fix(es):\n\n* httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data() (CVE-2026-34059)\n\n* httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check (CVE-2026-34032)\n\n* httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions (CVE-2026-33857)\n\n* httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash (CVE-2026-33007)\n\n* Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow (CVE-2026-28780)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:21433",
  "modified": "2026-06-18T12:06:11.854752Z",
  "published": "2026-06-04T12:04:37.164871Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:21433"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464940"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464953"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466913"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464952"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465299"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: httpd security update",
  "upstream": [
    "CVE-2026-28780",
    "CVE-2026-33007",
    "CVE-2026-33857",
    "CVE-2026-34032",
    "CVE-2026-34059"
  ]
}

RLSA-2026:22140 (CVE-2025-53020)

Vulnerability from osv_rocky – Published: 2026-06-01 18:02 – Updated: 2026-06-16 00:05 – Source website

Summary

Important: httpd:2.4 security update

Details

The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.

Security Fix(es):

httpd: Apache HTTP Server: HTTP/2 DoS by Memory Increase (CVE-2025-53020)
httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data() (CVE-2026-34059)
httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check (CVE-2026-34032)
httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions (CVE-2026-33857)
httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash (CVE-2026-33007)
Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow (CVE-2026-28780)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

8.2 (High)


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

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:22140	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2379343	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2464940	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2464952	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2464953	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2465299	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2466913	REPORT

JSON

To clipboard

{
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    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "httpd",
        "purl": "pkg:rpm/rocky-linux/httpd?distro=rocky-linux-8\u0026epoch=0"
      },
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "httpd",
        "purl": "pkg:rpm/rocky-linux/httpd?distro=rocky-linux-8-aarch64\u0026epoch=0"
      },
      "ranges": [
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          "type": "ECOSYSTEM"
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    {
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      },
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          },
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        }
      ]
    },
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "httpd",
        "purl": "pkg:rpm/rocky-linux/httpd?distro=rocky-linux-8-aarch64\u0026epoch=0"
      },
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          ],
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      ]
    },
    {
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        "ecosystem": "Rocky Linux:8",
        "name": "httpd",
        "purl": "pkg:rpm/rocky-linux/httpd?distro=rocky-linux-8-aarch64\u0026epoch=0"
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            }
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        }
      ]
    },
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
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    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "httpd",
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    },
    {
      "package": {
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    {
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        "ecosystem": "Rocky Linux:8",
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            {
              "fixed": "0:1.15.7-10.module+el8.10.0+1775+6b057638"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
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        {
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      "package": {
        "ecosystem": "Rocky Linux:8",
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            }
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          "type": "ECOSYSTEM"
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      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "details": "The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.\n\nSecurity Fix(es):\n\n* httpd: Apache HTTP Server: HTTP/2 DoS by Memory Increase (CVE-2025-53020)\n\n* httpd: mod_proxy_ajp: heap-based buffer over-read and memory disclosure in ajp_parse_data() (CVE-2026-34059)\n\n* httpd: mod_proxy_ajp: heap-based buffer over-read due to missing null-termination check (CVE-2026-34032)\n\n* httpd: mod_proxy_ajp: off-by-one out-of-bounds reads in AJP getter functions (CVE-2026-33857)\n\n* httpd: mod_authn_socache: NULL pointer dereference can cause a child process crash (CVE-2026-33007)\n\n* Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow (CVE-2026-28780)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:22140",
  "modified": "2026-06-16T00:05:51.953493Z",
  "published": "2026-06-01T18:02:48.676949Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:22140"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2379343"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464940"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464952"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464953"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2465299"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466913"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: httpd:2.4 security update",
  "upstream": [
    "CVE-2025-53020",
    "CVE-2026-28780",
    "CVE-2026-33007",
    "CVE-2026-33857",
    "CVE-2026-34032",
    "CVE-2026-34059"
  ]
}

SUSE-SU-2026:2103-1

Vulnerability from csaf_suse - Published: 2026-05-28 12:34 - Updated: 2026-09-16 19:38

Summary

Security update for apache2

Severity

Important

Scope

11 vulnerabilities in this advisory, including CVE-2026-34032.

CVE-2026-34032

8.2 (High)


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

Recommended: 63 products

Open the full advisory

SUSE-SU-2026:2104-1

Vulnerability from csaf_suse - Published: 2026-05-28 14:03 - Updated: 2026-05-28 14:03

Summary

Security update for apache2

Severity

Important

Scope

11 vulnerabilities in this advisory, including CVE-2026-34032.

CVE-2026-34032

8.2 (High)


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

Recommended: 25 products

Open the full advisory

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-34032 (GCVE-0-2026-34032)

RHSA-2026:36846

RHSA-2026:47046

RHSA-2026:66323

RHSA-2026:67152

RHSA-2026:62165

RLSA-2026:21391 (CVE-2026-28780)

RLSA-2026:21433 (CVE-2026-28780)

RLSA-2026:22140 (CVE-2025-53020)

SUSE-SU-2026:2103-1

SUSE-SU-2026:2104-1

Tags

Sightings

Nomenclature

Related by attack behaviour