Vulnerability-Lookup

OESA-2026-2726 (CVE-2026-47729)

Vulnerability from osv_openeuler – Published: 2026-06-24 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

squid security update

Details

Squid is a high-performance proxy caching server. It handles all requests in a single, non-blocking, I/O-driven process and keeps meta data and implements negative caching of failed requests.

Security Fix(es):

'Hi all,', "CVE-2026-47729\n\nDue to a Improper Validation of Syntactic Correctness of Input\nbug, Squid is vulnerable to a Out-of-bounds Read\nattack against the FTP gateway.\n\nThis problem allows a trusted client to perform an Out-of-Bounds\nRead from random unrelated transactions when accessing a\nmisbehaving FTP server through Squid's gateway feature.\n\n<", '>\n\n\n\nCVE-2026-50012\n\nDue to an Improper Input Validation bug, Squid is vulnerable to\na Heap-based Buffer Overflow attack against cache digests.\n\nThis problem allows a trusted server to perform a Heap-based\nBuffer Overflow when sending maliciously crafted replies to\ncache_digest request messages.\n\nThis attack is limited to Squid instances that have been\ncompiled with the --enable-cache-digests option.\n\n<', '>', 'Amos Jeffries\nThe Squid Software Foundation'

Severity

8.1 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-47729	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-50012	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-4.9-31.oe2203sp4.aarch64.rpm",
          "squid-debuginfo-4.9-31.oe2203sp4.aarch64.rpm",
          "squid-debugsource-4.9-31.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-31.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "squid-4.9-31.oe2203sp4.x86_64.rpm",
          "squid-debuginfo-4.9-31.oe2203sp4.x86_64.rpm",
          "squid-debugsource-4.9-31.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-31.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-6.6-9.oe2403sp1.aarch64.rpm",
          "squid-debuginfo-6.6-9.oe2403sp1.aarch64.rpm",
          "squid-debugsource-6.6-9.oe2403sp1.aarch64.rpm"
        ],
        "src": [
          "squid-6.6-9.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "squid-6.6-9.oe2403sp1.x86_64.rpm",
          "squid-debuginfo-6.6-9.oe2403sp1.x86_64.rpm",
          "squid-debugsource-6.6-9.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6-9.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-6.6-9.oe2403sp3.aarch64.rpm",
          "squid-debuginfo-6.6-9.oe2403sp3.aarch64.rpm",
          "squid-debugsource-6.6-9.oe2403sp3.aarch64.rpm"
        ],
        "src": [
          "squid-6.6-9.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "squid-6.6-9.oe2403sp3.x86_64.rpm",
          "squid-debuginfo-6.6-9.oe2403sp3.x86_64.rpm",
          "squid-debugsource-6.6-9.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6-9.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "squid-4.9-27.oe2003sp4.aarch64.rpm",
          "squid-debuginfo-4.9-27.oe2003sp4.aarch64.rpm",
          "squid-debugsource-4.9-27.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "squid-4.9-27.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "squid-4.9-27.oe2003sp4.x86_64.rpm",
          "squid-debuginfo-4.9-27.oe2003sp4.x86_64.rpm",
          "squid-debugsource-4.9-27.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "squid",
        "purl": "pkg:rpm/openEuler/squid\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.9-27.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Squid is a high-performance proxy caching server. It handles all requests in a single, non-blocking, I/O-driven process and keeps meta data and implements negative caching of failed requests.\r\n\r\nSecurity Fix(es):\n\n[\u0026apos;Hi all,\u0026apos;, \u0026quot;CVE-2026-47729\\n\\nDue to a Improper Validation of Syntactic Correctness of Input\\nbug, Squid is vulnerable to a Out-of-bounds Read\\nattack against the FTP gateway.\\n\\nThis problem allows a trusted client to perform an Out-of-Bounds\\nRead from random unrelated transactions when accessing a\\nmisbehaving FTP server through Squid\u0026apos;s gateway feature.\\n\\n\u0026lt;\u0026quot;, \u0026apos;\u0026gt;\\n\\n\\n\\nCVE-2026-50012\\n\\nDue to an Improper Input Validation bug, Squid is vulnerable to\\na Heap-based Buffer Overflow attack against cache digests.\\n\\nThis problem allows a trusted server to perform a Heap-based\\nBuffer Overflow when sending maliciously crafted replies to\\ncache_digest request messages.\\n\\nThis attack is limited to Squid instances that have been\\ncompiled with the --enable-cache-digests option.\\n\\n\u0026lt;\u0026apos;, \u0026apos;\u0026gt;\u0026apos;, \u0026apos;Amos Jeffries\\nThe Squid Software Foundation\u0026apos;](CVE-2026-47729)\n\n[\u0026apos;Hi all,\u0026apos;, \u0026quot;CVE-2026-47729\\n\\nDue to a Improper Validation of Syntactic Correctness of Input\\nbug, Squid is vulnerable to a Out-of-bounds Read\\nattack against the FTP gateway.\\n\\nThis problem allows a trusted client to perform an Out-of-Bounds\\nRead from random unrelated transactions when accessing a\\nmisbehaving FTP server through Squid\u0026apos;s gateway feature.\\n\\n\u0026lt;\u0026quot;, \u0026apos;\u0026gt;\\n\\n\\n\\nCVE-2026-50012\\n\\nDue to an Improper Input Validation bug, Squid is vulnerable to\\na Heap-based Buffer Overflow attack against cache digests.\\n\\nThis problem allows a trusted server to perform a Heap-based\\nBuffer Overflow when sending maliciously crafted replies to\\ncache_digest request messages.\\n\\nThis attack is limited to Squid instances that have been\\ncompiled with the --enable-cache-digests option.\\n\\n\u0026lt;\u0026apos;, \u0026apos;\u0026gt;\u0026apos;, \u0026apos;Amos Jeffries\\nThe Squid Software Foundation\u0026apos;](CVE-2026-50012)",
  "id": "OESA-2026-2726",
  "modified": "2026-08-06T11:11:39Z",
  "published": "2026-06-24T11:11:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2726"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47729"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50012"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "squid security update",
  "upstream": [
    "CVE-2026-47729",
    "CVE-2026-50012"
  ]
}

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

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

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

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"
}

CVE-2026-50012 (GCVE-0-2026-50012)

Vulnerability from cvelistv5 – Published: 2026-07-16 16:11 – Updated: 2026-07-17 14:04

Title

Squid: Memory corruption in cache_digest reply handling

Summary

Squid is a caching proxy for the Web. Prior to 7.6, due to an improper input validation bug in cache digest reply handling (peerDigestSwapInMask in src/peer_digest.cc), Squid is vulnerable to a heap-based buffer overflow: a cache digest's on-the-wire size may be larger than the mask_size declared within the digest, so a trusted peer sending a maliciously crafted reply to a cache_digest request message can trigger the overflow. This attack is limited to Squid instances compiled with the --enable-cache-digests option and configured with cache_peer entries. This issue is fixed in version 7.6.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-17 14:04 UTC

CWE

CWE-20 - Improper Input Validation
CWE-122 - Heap-based Buffer Overflow

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/squid-cache/squid/security/adv…	x_refsource_CONFIRM
https://github.com/squid-cache/squid/pull/2423	x_refsource_MISC
https://github.com/squid-cache/squid/commit/19fcf…	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-2026-50012",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-17T14:04:19.455063Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-17T14:04:25.895Z",
          "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 input validation bug in cache digest reply handling (peerDigestSwapInMask in src/peer_digest.cc), Squid is vulnerable to a heap-based buffer overflow: a cache digest\u0027s on-the-wire size may be larger than the mask_size declared within the digest, so a trusted peer sending a maliciously crafted reply to a cache_digest request message can trigger the overflow. This attack is limited to Squid instances compiled with the --enable-cache-digests option and configured with cache_peer entries. This issue is fixed in version 7.6."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
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              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-16T16:11:34.488Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/squid-cache/squid/security/advisories/GHSA-5vmx-9x64-9284",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-5vmx-9x64-9284"
        },
        {
          "name": "https://github.com/squid-cache/squid/pull/2423",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/pull/2423"
        },
        {
          "name": "https://github.com/squid-cache/squid/commit/19fcfe922717c8b255270c032dcde4071c003bcd",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/squid-cache/squid/commit/19fcfe922717c8b255270c032dcde4071c003bcd"
        },
        {
          "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-5vmx-9x64-9284",
        "discovery": "UNKNOWN"
      },
      "title": "Squid: Memory corruption in cache_digest reply handling"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-50012",
    "datePublished": "2026-07-16T16:11:34.488Z",
    "dateReserved": "2026-06-02T22:46:02.579Z",
    "dateUpdated": "2026-07-17T14:04:25.895Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

OESA-2026-2726 (CVE-2026-47729)

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

CVE-2026-50012 (GCVE-0-2026-50012)

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