Vulnerability-Lookup

UBUNTU-CVE-2026-47729 (CVE-2026-47729)

Vulnerability from osv_ubuntu – Published: 2026-06-12 00:00 – Updated: 2026-07-29 07:58 – Source website

Details

Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of input in the FTP gateway (src/clients/FtpGateway.cc), Squid is vulnerable to an out-of-bounds read: when a listing entry date in the TypeA or TypeB directory-listing formats is not followed by a filename, parsing was not restricted to the input buffer, so a trusted client accessing a misbehaving FTP server through Squid's gateway feature could read memory from random unrelated transactions. This issue is fixed in version 7.6.

Severity

6.5 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-47729	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-47729	REPORT
	https://www.openwall.com/lists/oss-security/2026/…	REPORT
	https://ubuntu.com/security/notices/USN-8435-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.12-1ubuntu7.16+esm6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16+esm6?arch=source\u0026distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3.8-1ubuntu16",
        "3.3.8-1ubuntu17",
        "3.5.12-1ubuntu6",
        "3.5.12-1ubuntu7",
        "3.5.12-1ubuntu7.1",
        "3.5.12-1ubuntu7.2",
        "3.5.12-1ubuntu7.3",
        "3.5.12-1ubuntu7.4",
        "3.5.12-1ubuntu7.5",
        "3.5.12-1ubuntu7.6",
        "3.5.12-1ubuntu7.7",
        "3.5.12-1ubuntu7.8",
        "3.5.12-1ubuntu7.9",
        "3.5.12-1ubuntu7.10",
        "3.5.12-1ubuntu7.11",
        "3.5.12-1ubuntu7.12",
        "3.5.12-1ubuntu7.13",
        "3.5.12-1ubuntu7.14",
        "3.5.12-1ubuntu7.15",
        "3.5.12-1ubuntu7.16",
        "3.5.12-1ubuntu7.16+esm1",
        "3.5.12-1ubuntu7.16+esm2",
        "3.5.12-1ubuntu7.16+esm3",
        "3.5.12-1ubuntu7.16+esm4",
        "3.5.12-1ubuntu7.16+esm5",
        "3.5.12-1ubuntu7.16+esm6"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squid3",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "3.5.27-1ubuntu1.14+esm5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "squid3",
        "purl": "pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.14+esm5?arch=source\u0026distro=esm-infra/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.5.23-5ubuntu1",
        "3.5.23-5ubuntu2",
        "3.5.27-1ubuntu1",
        "3.5.27-1ubuntu1.1",
        "3.5.27-1ubuntu1.2",
        "3.5.27-1ubuntu1.3",
        "3.5.27-1ubuntu1.4",
        "3.5.27-1ubuntu1.5",
        "3.5.27-1ubuntu1.6",
        "3.5.27-1ubuntu1.7",
        "3.5.27-1ubuntu1.8",
        "3.5.27-1ubuntu1.9",
        "3.5.27-1ubuntu1.10",
        "3.5.27-1ubuntu1.11",
        "3.5.27-1ubuntu1.12",
        "3.5.27-1ubuntu1.13",
        "3.5.27-1ubuntu1.14",
        "3.5.27-1ubuntu1.14+esm1",
        "3.5.27-1ubuntu1.14+esm2",
        "3.5.27-1ubuntu1.14+esm3",
        "3.5.27-1ubuntu1.14+esm4",
        "3.5.27-1ubuntu1.14+esm5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "4.10-1ubuntu1.13+esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@4.10-1ubuntu1.13+esm2?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.8-1ubuntu2",
        "4.8-1ubuntu3",
        "4.9-2ubuntu1",
        "4.9-2ubuntu2",
        "4.9-2ubuntu3",
        "4.9-2ubuntu4",
        "4.10-1ubuntu1",
        "4.10-1ubuntu1.1",
        "4.10-1ubuntu1.2",
        "4.10-1ubuntu1.3",
        "4.10-1ubuntu1.4",
        "4.10-1ubuntu1.5",
        "4.10-1ubuntu1.6",
        "4.10-1ubuntu1.7",
        "4.10-1ubuntu1.8",
        "4.10-1ubuntu1.9",
        "4.10-1ubuntu1.10",
        "4.10-1ubuntu1.11",
        "4.10-1ubuntu1.12",
        "4.10-1ubuntu1.13",
        "4.10-1ubuntu1.13+esm1",
        "4.10-1ubuntu1.13+esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@5.9-0ubuntu0.22.04.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.9-0ubuntu0.22.04.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.13-10ubuntu5",
        "5.2-1ubuntu1",
        "5.2-1ubuntu3",
        "5.2-1ubuntu4",
        "5.2-1ubuntu4.1",
        "5.2-1ubuntu4.2",
        "5.2-1ubuntu4.3",
        "5.7-0ubuntu0.22.04.1",
        "5.7-0ubuntu0.22.04.2",
        "5.7-0ubuntu0.22.04.3",
        "5.7-0ubuntu0.22.04.4",
        "5.9-0ubuntu0.22.04.1",
        "5.9-0ubuntu0.22.04.2",
        "5.9-0ubuntu0.22.04.3",
        "5.9-0ubuntu0.22.04.4",
        "5.9-0ubuntu0.22.04.5"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.24.04.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.24.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1-2ubuntu1",
        "6.1-2ubuntu2",
        "6.5-1ubuntu1",
        "6.5-1ubuntu2",
        "6.5-1ubuntu3",
        "6.6-1ubuntu4",
        "6.6-1ubuntu5",
        "6.6-1ubuntu5.1",
        "6.10-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.2",
        "6.13-0ubuntu0.24.04.3",
        "6.14-0ubuntu0.24.04.1",
        "6.14-0ubuntu0.24.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.25.10.4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.25.10.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.13-1ubuntu1",
        "6.13-1ubuntu2",
        "6.13-1ubuntu3",
        "6.13-1ubuntu4",
        "6.13-1ubuntu4.1",
        "6.14-0ubuntu0.25.10.1",
        "6.14-0ubuntu0.25.10.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "7.2-2ubuntu2.2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "7.2-2ubuntu2.2"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "7.2-2ubuntu2.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@7.2-2ubuntu2.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2-2ubuntu2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.13-1ubuntu4",
        "6.13-1ubuntu5",
        "7.2-2ubuntu1",
        "7.2-2ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of input in the FTP gateway (src/clients/FtpGateway.cc), Squid is vulnerable to an out-of-bounds read: when a listing entry date in the TypeA or TypeB directory-listing formats is not followed by a filename, parsing was not restricted to the input buffer, so a trusted client accessing a misbehaving FTP server through Squid\u0027s gateway feature could read memory from random unrelated transactions. This issue is fixed in version 7.6.",
  "id": "UBUNTU-CVE-2026-47729",
  "modified": "2026-07-29T07:58:07Z",
  "published": "2026-06-12T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-47729"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-47729"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2026/06/12/1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8435-1"
    }
  ],
  "related": [
    "USN-8435-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-47729"
  ]
}

CVE-2026-47729 (GCVE-0-2026-47729)

Vulnerability from cvelistv5 – Published: 2026-07-16 16:13 – Updated: 2026-07-17 18:07

Title

Squid: Memory disclosure in FTP gateway

Summary

Severity

6.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-16 17:52 UTC

CWE

CWE-125 - Out-of-bounds Read
CWE-1289 - Improper Validation of Unsafe Equivalence in Input

Assigner

GitHub_M mitre root Scorecard

References

5 references

URL	Tags
https://github.com/squid-cache/squid/security/adv…	x_refsource_CONFIRM
https://github.com/squid-cache/squid/pull/2408	x_refsource_MISC
https://github.com/squid-cache/squid/pull/2409	x_refsource_MISC
https://github.com/squid-cache/squid/commit/865a1…	x_refsource_MISC
https://github.com/squid-cache/squid/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
squid-cache	squid	Affected: < 7.6

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-47729",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-16T17:52:23.166119Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-17T18:07:10.084Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "squid",
          "vendor": "squid-cache",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Squid is a caching proxy for the Web. Prior to 7.6, due to an improper validation of syntactic correctness of input in the FTP gateway (src/clients/FtpGateway.cc), Squid is vulnerable to an out-of-bounds read: when a listing entry date in the TypeA or TypeB directory-listing formats is not followed by a filename, parsing was not restricted to the input buffer, so a trusted client accessing a misbehaving FTP server through Squid\u0027s gateway feature could read memory from random unrelated transactions. This issue is fixed in version 7.6."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1289",
              "description": "CWE-1289: Improper Validation of Unsafe Equivalence in Input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-16T16:13:19.767Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/squid-cache/squid/security/advisories/GHSA-8c37-pxjq-qwrg",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-8c37-pxjq-qwrg"
        },
        {
          "name": "https://github.com/squid-cache/squid/pull/2408",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/pull/2408"
        },
        {
          "name": "https://github.com/squid-cache/squid/pull/2409",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/pull/2409"
        },
        {
          "name": "https://github.com/squid-cache/squid/commit/865a131c7d557e68c965043d98c2eccae26deef8",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/commit/865a131c7d557e68c965043d98c2eccae26deef8"
        },
        {
          "name": "https://github.com/squid-cache/squid/releases/tag/SQUID_7_6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/releases/tag/SQUID_7_6"
        }
      ],
      "source": {
        "advisory": "GHSA-8c37-pxjq-qwrg",
        "discovery": "UNKNOWN"
      },
      "title": "Squid: Memory disclosure in FTP gateway"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-47729",
    "datePublished": "2026-07-16T16:13:19.767Z",
    "dateReserved": "2026-05-19T21:29:25.483Z",
    "dateUpdated": "2026-07-17T18:07:10.084Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

USN-8435-1 (UBUNTU-CVE-2026-47729)

Vulnerability from osv_ubuntu – Published: 2026-06-16 14:27 – Updated: 2026-07-24 12:43 – Source website

Summary

squid vulnerabilities

Details

It was discovered that Squid incorrectly handled FTP gateway processing under certain circumstances, which could result in an out-of-bounds read. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly obtain sensitive information. (CVE-2026-47729)

It was discovered that Squid incorrectly handled cache digest processing under certain circumstances, which could result in a heap-based buffer overflow. A remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-50012)

References

URL

Type

	https://ubuntu.com/security/notices/USN-8435-1	ADVISORY
	https://ubuntu.com/security/CVE-2026-47729	REPORT
	https://ubuntu.com/security/CVE-2026-50012	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-47729",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-50012",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "5.9-0ubuntu0.22.04.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@5.9-0ubuntu0.22.04.7?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.9-0ubuntu0.22.04.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "4.13-10ubuntu5",
        "5.2-1ubuntu1",
        "5.2-1ubuntu3",
        "5.2-1ubuntu4",
        "5.2-1ubuntu4.1",
        "5.2-1ubuntu4.2",
        "5.2-1ubuntu4.3",
        "5.7-0ubuntu0.22.04.1",
        "5.7-0ubuntu0.22.04.2",
        "5.7-0ubuntu0.22.04.3",
        "5.7-0ubuntu0.22.04.4",
        "5.9-0ubuntu0.22.04.1",
        "5.9-0ubuntu0.22.04.2",
        "5.9-0ubuntu0.22.04.3",
        "5.9-0ubuntu0.22.04.4",
        "5.9-0ubuntu0.22.04.5"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-47729",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-50012",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.24.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.24.04.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.24.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.1-2ubuntu1",
        "6.1-2ubuntu2",
        "6.5-1ubuntu1",
        "6.5-1ubuntu2",
        "6.5-1ubuntu3",
        "6.6-1ubuntu4",
        "6.6-1ubuntu5",
        "6.6-1ubuntu5.1",
        "6.10-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.1",
        "6.13-0ubuntu0.24.04.2",
        "6.13-0ubuntu0.24.04.3",
        "6.14-0ubuntu0.24.04.1",
        "6.14-0ubuntu0.24.04.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-47729",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-50012",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-cgi",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squid-purge",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          },
          {
            "binary_name": "squidclient",
            "binary_version": "6.14-0ubuntu0.25.10.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@6.14-0ubuntu0.25.10.4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.14-0ubuntu0.25.10.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.13-1ubuntu1",
        "6.13-1ubuntu2",
        "6.13-1ubuntu3",
        "6.13-1ubuntu4",
        "6.13-1ubuntu4.1",
        "6.14-0ubuntu0.25.10.1",
        "6.14-0ubuntu0.25.10.2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2026-47729",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2026-50012",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:26.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "squid",
            "binary_version": "7.2-2ubuntu2.2"
          },
          {
            "binary_name": "squid-common",
            "binary_version": "7.2-2ubuntu2.2"
          },
          {
            "binary_name": "squid-openssl",
            "binary_version": "7.2-2ubuntu2.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "squid",
        "purl": "pkg:deb/ubuntu/squid@7.2-2ubuntu2.2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2-2ubuntu2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.13-1ubuntu4",
        "6.13-1ubuntu5",
        "7.2-2ubuntu1",
        "7.2-2ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Squid incorrectly handled FTP gateway processing\nunder certain circumstances, which could result in an out-of-bounds read. A\nremote attacker could use this issue to cause Squid to crash, resulting in\na denial of service, or possibly obtain sensitive information.\n(CVE-2026-47729)\n\nIt was discovered that Squid incorrectly handled cache digest processing\nunder certain circumstances, which could result in a heap-based buffer\noverflow. A remote attacker could use this issue to cause Squid to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2026-50012)",
  "id": "USN-8435-1",
  "modified": "2026-07-24T12:43:27Z",
  "published": "2026-06-16T14:27:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8435-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-47729"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-50012"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "squid vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2026-47729",
    "UBUNTU-CVE-2026-50012"
  ]
}

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.
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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.

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.

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Action not permitted

UBUNTU-CVE-2026-47729 (CVE-2026-47729)

CVE-2026-47729 (GCVE-0-2026-47729)

USN-8435-1 (UBUNTU-CVE-2026-47729)

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Nomenclature

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