Squid: Memory disclosure in FTP gateway

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-47729
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-16 17:16:57 UTC
Updated2026-07-20 01:43:02 UTC
DescriptionSquid 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

EPSS: 0.019490000 probability, percentile 0.780030000 (date 2026-07-20)

Problem Types: CWE-125 | CWE-1289 | CWE-125 CWE-125: Out-of-bounds Read | CWE-1289 CWE-1289: Improper Validation of Unsafe Equivalence in Input

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Squid-cache Squid All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Squid-cache Squid affected < 7.6 Not specified

References

ReferenceSourceLinkTags
github.com/squid-cache/squid/commit/865a131c7d557e68c965043d98c2eccae26d... [email protected] github.com Patch
github.com/squid-cache/squid/security/advisories/GHSA-8c37-pxjq-qwrg [email protected] github.com Vendor Advisory
github.com/squid-cache/squid/pull/2408 [email protected] github.com Patch
github.com/squid-cache/squid/pull/2409 [email protected] github.com Patch
github.com/squid-cache/squid/releases/tag/SQUID_7_6 [email protected] github.com Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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