CVE-2026-50012

Name
CVE-2026-50012
Description
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security-advisories@github.com https://github.com/squid-cache/squid/commit/19fcfe922717c8b255270c032dcde4071c003bcd
security-advisories@github.com https://github.com/squid-cache/squid/pull/2423
security-advisories@github.com https://github.com/squid-cache/squid/releases/tag/SQUID_7_6
security-advisories@github.com https://github.com/squid-cache/squid/security/advisories/GHSA-5vmx-9x64-9284

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* squid >= None < 7.6

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
squid edge-main 7.6-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
squid edge-main 7.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 7.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 7.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 6.12-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 6.12-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 6.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 6.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 6.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 6.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 5.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 5.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 5.0.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 5.0.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid edge-main 4.13.0-r0 None possibly vulnerable
squid edge-main 4.12.0-r0 None possibly vulnerable
squid edge-main 4.10-r0 None possibly vulnerable
squid edge-main 4.9-r0 None possibly vulnerable
squid edge-main 4.8-r0 None possibly vulnerable
squid edge-main 3.5.27-r2 None possibly vulnerable
squid 3.24-main 7.6-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
squid 3.24-main 7.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.23-main 7.6-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
squid 3.23-main 7.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.23-main 7.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.22-main 6.12-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.22-main 6.6-r0 None possibly vulnerable
squid 3.22-main 6.5-r0 None possibly vulnerable
squid 3.22-main 6.4-r0 None possibly vulnerable
squid 3.22-main 6.1-r0 None possibly vulnerable
squid 3.22-main 5.7-r0 None possibly vulnerable
squid 3.22-main 5.2-r0 None possibly vulnerable
squid 3.22-main 5.0.6-r0 None possibly vulnerable
squid 3.22-main 5.0.5-r0 None possibly vulnerable
squid 3.22-main 4.13.0-r0 None possibly vulnerable
squid 3.22-main 4.12.0-r0 None possibly vulnerable
squid 3.22-main 4.10-r0 None possibly vulnerable
squid 3.22-main 4.9-r0 None possibly vulnerable
squid 3.22-main 4.8-r0 None possibly vulnerable
squid 3.22-main 3.5.27-r2 None possibly vulnerable
squid 3.21-main 6.12-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.21-main 6.6-r0 None possibly vulnerable
squid 3.21-main 6.5-r0 None possibly vulnerable
squid 3.21-main 6.4-r0 None possibly vulnerable
squid 3.21-main 6.1-r0 None possibly vulnerable
squid 3.21-main 5.7-r0 None possibly vulnerable
squid 3.21-main 5.2-r0 None possibly vulnerable
squid 3.21-main 5.0.6-r0 None possibly vulnerable
squid 3.21-main 5.0.5-r0 None possibly vulnerable
squid 3.21-main 4.13.0-r0 None possibly vulnerable
squid 3.21-main 4.12.0-r0 None possibly vulnerable
squid 3.21-main 4.10-r0 None possibly vulnerable
squid 3.21-main 4.9-r0 None possibly vulnerable
squid 3.21-main 4.8-r0 None possibly vulnerable
squid 3.21-main 3.5.27-r2 None possibly vulnerable
squid 3.20-main 6.9-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.20-main 6.6-r0 None possibly vulnerable
squid 3.20-main 6.5-r0 None possibly vulnerable
squid 3.20-main 6.4-r0 None possibly vulnerable
squid 3.20-main 6.1-r0 None possibly vulnerable
squid 3.20-main 5.7-r0 None possibly vulnerable
squid 3.20-main 5.2-r0 None possibly vulnerable
squid 3.20-main 5.0.6-r0 None possibly vulnerable
squid 3.20-main 5.0.5-r0 None possibly vulnerable
squid 3.20-main 4.13.0-r0 None possibly vulnerable
squid 3.20-main 4.12.0-r0 None possibly vulnerable
squid 3.20-main 4.10-r0 None possibly vulnerable
squid 3.20-main 4.9-r0 None possibly vulnerable
squid 3.20-main 4.8-r0 None possibly vulnerable
squid 3.20-main 3.5.27-r2 None possibly vulnerable
squid 3.19-main 6.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.19-main 6.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
squid 3.19-main 6.4-r0 None possibly vulnerable
squid 3.19-main 6.1-r0 None possibly vulnerable
squid 3.19-main 5.7-r0 None possibly vulnerable
squid 3.19-main 5.2-r0 None possibly vulnerable
squid 3.19-main 5.0.6-r0 None possibly vulnerable
squid 3.19-main 5.0.5-r0 None possibly vulnerable
squid 3.19-main 4.13.0-r0 None possibly vulnerable
squid 3.19-main 4.12.0-r0 None possibly vulnerable
squid 3.19-main 4.10-r0 None possibly vulnerable
squid 3.19-main 4.9-r0 None possibly vulnerable
squid 3.19-main 4.8-r0 None possibly vulnerable
squid 3.19-main 3.5.27-r2 None possibly vulnerable