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Advisory record · GHSA-x4m4-345f-5h5g

Apache Tomcat vulnerable to Insertion of Sensitive Information into Log File

CVSS 7.5 HighEPSS 0.0046 · 39th percentile

Published by the GitHub Advisory Database at 9 Apr 2026, 21:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.tomcat:tomcat-tribesMaven>=9.0.13, <9.0.117 || >=10.1.0-M1, <10.1.54 || >=11.0.0-M1, <11.0.219.0.117, 10.1.54, 11.0.21
org.apache.tomcat:tomcatMaven>=9.0.13, <9.0.117 || >=10.1.0-M1, <10.1.54 || >=11.0.0-M1, <11.0.219.0.117, 10.1.54, 11.0.21
org.apache.tomcat.embed:tomcat-embed-coreMaven>=9.0.13, <9.0.117 || >=10.1.0-M1, <10.1.54 || >=11.0.0-M1, <11.0.219.0.117, 10.1.54, 11.0.21
Identifiers
GHSA-x4m4-345f-5h5g · BIT-tomcat-2026-34487 · CVE-2026-34487
Weakness (CWE)
CWE-532
Tags
Published
9 Apr 2026
Updated
11 Sept 2026

Machine-written summary

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

Apache Tomcat (tomcat, tomcat-tribes and tomcat-embed-core packages) versions 9.0.13 through 9.0.116, 10.1.0-M1 through 10.1.53, and 11.0.0-M1 through 11.0.20 are affected. The cloud membership component for clustering writes the Kubernetes bearer token to a log file, so anyone who can read those logs can obtain the token. Upgrade to 9.0.117, 10.1.54, 11.0.21 or later.

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
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0046, the 39th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 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.