CVE-2026-47729

Squid: Memory disclosure in FTP gateway

MEDIUM
6.5
CVSS Score
Published: July 16, 2026 at 04:13 PM UTC
Updated: October 24, 2026 at 08:10 PM UTC
2 products affected across 1 vendorSquidCache Squid

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Severity
MEDIUM6.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versionsv < 7.6
Affected range stops below 7.6, so it looks safe — our inference, not a vendor statement
v < 7.6
Affected range stops below 7.6, so it looks safe — our inference, not a vendor statement

References (5)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/squid-cache/squid/security/advisories/GHSA-8c37-pxjq-qwrg
x_refsource_MISCPatch
Source: cverecord
https://github.com/squid-cache/squid/pull/2408
x_refsource_MISCPatch
Source: cverecord
https://github.com/squid-cache/squid/pull/2409
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/squid-cache/squid/releases/tag/SQUID_7_6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-125CWE-1289

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