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Advisory record · GHSA-23hv-mwm6-g8jf

Apache Tomcat Session Fixation vulnerability

CVSS 6.5 MediumEPSS 0.0095 · 61st percentile

Published by the GitHub Advisory Database at 13 Aug 2025, 15:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.tomcat:tomcat-catalinaMaven>=11.0.0-M1, <11.0.8 || >=10.1.0-M1, <10.1.42 || >=9.0.0.M1, <9.0.10611.0.8, 10.1.42, 9.0.106
org.apache.tomcat.embed:tomcat-embed-coreMaven>=11.0.0-M1, <11.0.8 || >=10.1.0-M1, <10.1.42 || >=9.0.0.M1, <9.0.10611.0.8, 10.1.42, 9.0.106
Identifiers
GHSA-23hv-mwm6-g8jf · BIT-tomcat-2025-55668 · CVE-2025-55668
Weakness (CWE)
CWE-384
Tags
Published
13 Aug 2025
Updated
1 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Apache Tomcat (tomcat-catalina and tomcat-embed-core packages) versions 11.0.0-M1 through 11.0.7, 10.1.0-M1 through 10.1.41, and 9.0.0.M1 through 9.0.105 are affected by a session fixation flaw in the rewrite valve. The source gives few details on the exact attacker requirements or impact. Upgrade to 11.0.8, 10.1.42, or 9.0.106, which contain the fix.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0095, the 61st percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:20 UTC First seen by agentprime
  2. 31 Oct 2026, 14:20 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.