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OpenAdvisories
High ALAS2-2026-3961 1 CVE

Important: squid security update (Amazon Linux 2)

Published Sep 28, 2026 · Updated Sep 28, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-61642: Due to a CWE-841 Improper Enforcement of Behavioral Workflow bug Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. This problem allows a trusted client to perform an HTTP Request Smuggling attack when HTTP/1.1 is used. Bypassing security mechanisms that may be in place between attacker and Squid. When there is an HTTP cache operating prior to the affected Squid, this Request Smuggling attack also allows the attacker to poison that web cache and store arbitrary malicious content at any URL for delivery to other clients future requests.

Fixed packages 4

ReleasePackageFixed in
Amazon Linux · 2 squid 7:3.5.20-17.amzn2.7.28
Amazon Linux · 2 squid-debuginfo 7:3.5.20-17.amzn2.7.28
Amazon Linux · 2 squid-migration-script 7:3.5.20-17.amzn2.7.28
Amazon Linux · 2 squid-sysvinit 7:3.5.20-17.amzn2.7.28

Vulnerabilities 1

  • High 7.7
    CVE-2026-61642

    Squid Request Smuggling in HTTP Transfer-Encoding

    Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing (`src/HttpHeader.cc`) accept…

    squid-cache squid squid squid3 Debian Ubuntu Azure Linux

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-61642.html