CVE-2026-47729

Name	CVE-2026-47729
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-6360-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
squid (PTS)	bullseye	4.13-10+deb11u3	vulnerable
	bullseye (security)	4.13-10+deb11u6	vulnerable
	bookworm	5.7-2+deb12u5	vulnerable
	bookworm (security)	5.7-2+deb12u4	vulnerable
	trixie (security), trixie	6.13-2+deb13u2	fixed
	forky, sid	7.6-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
squid	source	trixie	6.13-2+deb13u2		DSA-6360-1
squid	source	(unstable)	7.6-1

Notes

https://www.openwall.com/lists/oss-security/2026/06/12/1
https://blog.calif.io/p/squidbleed-cve-2026-47729
Fixed by: https://github.com/squid-cache/squid/commit/865a131c7d557e68c965043d98c2eccae26deef8 (SQUID_7_6)
https://github.com/squid-cache/squid/security/advisories/GHSA-8c37-pxjq-qwrg