CVE-2026-33930

Name	CVE-2026-33930
Description	Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1143062

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
trafficserver (PTS)	bullseye	8.1.10+ds-1~deb11u1	vulnerable
	bullseye (security)	8.1.11+ds-0+deb11u2	vulnerable
	bookworm, bookworm (security)	9.2.5+ds-0+deb12u4	vulnerable
	sid	9.2.5+ds-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
trafficserver	source	(unstable)	(unfixed)			1143062

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d