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Advisory record · GHSA-wm9w-rjj3-j356

Apache Tomcat - Denial of Service

CVSS 7.5 HighEPSS 0.046 · 91st percentile

Published by the GitHub Advisory Database at 3 Jul 2024, 21:39 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, <11.0.0-M21 || >=10.1.0-M1, <10.1.25 || >=9.0.0-M1, <9.0.90 || >=8.5.0, <=8.5.10011.0.0-M21, 10.1.25, 9.0.90
org.apache.tomcat:tomcat-coyoteMaven>=11.0.0-M1, <11.0.0-M21 || >=10.1.0-M1, <10.1.25 || >=9.0.0-M1, <9.0.90 || >=8.5.0, <=8.5.10011.0.0-M21, 10.1.25, 9.0.90
Identifiers
GHSA-wm9w-rjj3-j356 · BIT-tomcat-2024-34750 · CVE-2024-34750
Weakness (CWE)
CWE-400 · CWE-755
Tags
Published
3 Jul 2024
Updated
10 Sept 2026

Machine-written summary

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

Apache Tomcat (tomcat-embed-core and tomcat-coyote) versions 11.0.0-M1 through 11.0.0-M20, 10.1.0-M1 through 10.1.24, 9.0.0-M1 through 9.0.89, and 8.5.0 through 8.5.100 are affected. Tomcat mishandles excessive HTTP headers on HTTP/2 streams, so connections that should close can remain open, which can lead to denial of service. The source does not describe the attacker's required access in detail. Upgrade to 11.0.0-M21, 10.1.25, or 9.0.90.

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:N/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.046, the 91st 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.