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Advisory record · GHSA-mqg3-r7h5-24x4

Apache Tomcat has an Always-Incorrect Control Flow Implementation vulnerability

CVSS 9.1 CriticalCriticalEPSS 0.0061 · 49th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 29 Jun 2026, 21:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.tomcat.embed:tomcat-embed-coreMaven>=11.0.0-M1, <11.0.23 || >=10.1.0-M1, <10.1.56 || >=9.0.0.M1, <9.0.119 || >=8.5.0, <=8.5.10011.0.23, 10.1.56, 9.0.119
org.apache.tomcat:tomcatMaven>=11.0.0-M1, <11.0.23 || >=10.1.0-M1, <10.1.56 || >=9.0.0.M1, <9.0.119 || >=8.5.0, <=8.5.10011.0.23, 10.1.56, 9.0.119
org.apache.tomcat:tomcat-util-scanMaven>=11.0.0-M1, <11.0.23 || >=10.1.0-M1, <10.1.56 || >=9.0.0.M1, <9.0.119 || >=8.5.0, <=8.5.10011.0.23, 10.1.56, 9.0.119
Identifiers
GHSA-mqg3-r7h5-24x4 · BIT-tomcat-2026-55276 · CVE-2026-55276
Weakness (CWE)
CWE-670
Tags
Published
29 Jun 2026
Updated
4 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
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0061, the 49th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 29 Jun 2026, 21:32 UTC Confirmed by GitHub Advisory Database
  2. 4 Nov 2026, 16:55 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.