Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-fccv-jmmp-qg76

Apache Tomcat Improper Input Validation vulnerability

CVSS 7.5 HighEPSS 0.027 · 85th percentile

Published by the GitHub Advisory Database at 28 Nov 2023, 18:30 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, <11.0.0-M11 || >=10.1.0-M1, <10.1.16 || >=9.0.0-M1, <9.0.83 || >=8.5.0, <8.5.9611.0.0-M11, 10.1.16, 9.0.83, 8.5.96
org.apache.tomcat.embed:tomcat-embed-coreMaven>=11.0.0-M1, <11.0.0-M11 || >=10.1.0-M1, <10.1.16 || >=9.0.0-M1, <9.0.83 || >=8.5.0, <8.5.9611.0.0-M11, 10.1.16, 9.0.83, 8.5.96
org.apache.tomcat:tomcat-coyoteMaven>=11.0.0-M1, <11.0.0-M1111.0.0-M11
Identifiers
GHSA-fccv-jmmp-qg76 · BIT-tomcat-2023-46589 · CVE-2023-46589
Weakness (CWE)
CWE-20 · CWE-444
Tags
Published
28 Nov 2023
Updated
2 Oct 2026

Machine-written summary

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

Apache Tomcat versions 11.0.0-M1 through 11.0.0-M10, 10.1.0-M1 through 10.1.15, 9.0.0-M1 through 9.0.82, and 8.5.0 through 8.5.95 are affected, along with the tomcat-catalina, tomcat-embed-core and tomcat-coyote packages. A trailer header larger than the size limit can cause one request to be treated as several, enabling request smuggling when Tomcat sits behind a reverse proxy. Upgrade to 11.0.0-M11, 10.1.16, 9.0.83 or 8.5.96 or later, which fix the issue. Older, end-of-life versions may also be affected and have no fix listed.

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:N/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.027, the 85th percentile, on 5 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.