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Advisory record · GHSA-vfww-5hm6-hx2j

Apache Tomcat Vulnerable to Improper Neutralization of Escape, Meta, or Control Sequences

CVSS 9.6 CriticalCriticalEPSS 0.10 · 95th percentile

Critical, because:

  • CVSS score 9.6: 9.0 or more.
  • CVSS score 9.6 (7.0 or more) and EPSS 0.10 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the GitHub Advisory Database at 27 Oct 2025, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.tomcat:tomcatMaven>=11.0.0-M1, <11.0.11 || >=10.1.0-M1, <10.1.45 || >=9.0.40, <9.0.109 || >=8.5.60, <=8.5.10011.0.11, 10.1.45, 9.0.109
org.apache.tomcat.embed:tomcat-embed-coreMaven>=11.0.0-M1, <11.0.11 || >=10.1.0-M1, <10.1.45 || >=9.0.40, <9.0.109 || >=8.5.60, <=8.5.10011.0.11, 10.1.45, 9.0.109
org.apache.tomcat:tomcat-catalinaMaven>=11.0.0-M1, <11.0.11 || >=10.1.0-M1, <10.1.45 || >=9.0.40, <9.0.109 || >=8.5.60, <=8.5.10011.0.11, 10.1.45, 9.0.109
Identifiers
GHSA-vfww-5hm6-hx2j · BIT-tomcat-2025-55754 · CVE-2025-55754
Weakness (CWE)
CWE-150
Tags
Published
27 Oct 2025
Updated
10 Sept 2026

Machine-written summary

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

Apache Tomcat (org.apache.tomcat:tomcat, tomcat-embed-core and tomcat-catalina) is affected from 11.0.0-M1 through 11.0.10, 10.1.0-M1 through 10.1.44, 9.0.40 through 9.0.108, and 8.5.60 through 8.5.100. Tomcat did not escape ANSI escape sequences in log messages, so an attacker using a crafted URL could inject them into a Windows console that supports them, potentially manipulating the console and clipboard to trick an administrator into running a command. Upgrade to 11.0.11, 10.1.45, or 9.0.109 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
9.6 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.10, the 95th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 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.