CVEvulnerability
CVE-2026-50012
5.5 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-16
- Last modified
- 2026-10-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
- Weaknesses
- CWE-122, CWE-20
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.
Affected configurations
• squid-cache squid (< 7.6)
Related
References
- https://github.com/squid-cache/squid/commit/19fcfe922717c8b255270c032dcde4071c003bcd Patch
- https://github.com/squid-cache/squid/pull/2423 Patch
- https://github.com/squid-cache/squid/releases/tag/SQUID_7_6 Release Notes
- https://github.com/squid-cache/squid/security/advisories/GHSA-5vmx-9x64-9284 Vendor Advisory