Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-50012

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.023
EPSS Ranking 81.0%
CVSS Severity
CVSS v3 Score 5.5
Products affected by CVE-2026-50012


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