CVE-2026-73180

Name	CVE-2026-73180
Description	Insufficient Session Expiration vulnerability in Apache Tomcat meant that if the session ID for an authenticated HTTP session was changed after a WebSocket connection had been established under that authenticated HTTP session, the WebSokcet session would not be closed as required by the Jakarta WebSocket specification when the HTTP session ended. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, 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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
tomcat10 (PTS)	bookworm, bookworm (security)	10.1.55-1~deb12u1	vulnerable
	trixie (security), trixie	10.1.55-1~deb13u1	vulnerable
	forky, sid	10.1.55-1	vulnerable
tomcat11 (PTS)	trixie (security), trixie	11.0.22-1~deb13u1	vulnerable
	forky, sid	11.0.24-1	vulnerable
tomcat9 (PTS)	bullseye	9.0.43-2~deb11u10	vulnerable
	bullseye (security)	9.0.118-0+deb11u1	fixed
	bookworm	9.0.70-2	fixed
	trixie	9.0.95-1	fixed
	forky, sid	9.0.118-1	fixed

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

Package	Type	Release	Fixed Version
tomcat10	source	(unstable)	(unfixed)
tomcat11	source	(unstable)	(unfixed)
tomcat9	source	(unstable)	9.0.70-2

Notes

Starting with 9.0.70-2 src:tomcat9 no longer ships the server stack, using that as the fixed version
https://github.com/apache/tomcat/commit/e617a5d483b78851d289ca8dc1d68c49b541b419 (11.0.25)
https://github.com/apache/tomcat/commit/83427cbdb92ca41244dc3d242ca4308ed8ade7d3 (10.1.58)
https://github.com/apache/tomcat/commit/4b41a73a2f1a16647d7444ad6ee87d41a3ec414b (9.0.121)