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OpenAdvisories
High ALAS2-2026-3371 1 CVE

Important: squid security update (Amazon Linux 2)

Published Jun 22, 2026 · Updated Jun 22, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-50012: Due to an Improper Input Validation bug, Squid is vulnerable to a Heap-based Buffer Overflow attack against cache digests. This problem allows a trusted server to perform a Heap-based Buffer Overflow when sending maliciously crafted replies to cache_digest request messages. This attack is limited to Squid instances that have been compiled with the --enable-cache-digests option.

Fixed packages 4

ReleasePackageFixed in
Amazon Linux · 2 squid 7:3.5.20-17.amzn2.7.27
Amazon Linux · 2 squid-debuginfo 7:3.5.20-17.amzn2.7.27
Amazon Linux · 2 squid-migration-script 7:3.5.20-17.amzn2.7.27
Amazon Linux · 2 squid-sysvinit 7:3.5.20-17.amzn2.7.27

Vulnerabilities 1

  • Medium 5.5
    CVE-2026-50012

    Squid: Memory corruption in cache_digest reply handling

    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…

    squid-cache squid squid squid3 Debian Ubuntu Azure Linux Alpine

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-50012.html