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Advisory record · GHSA-7w75-32cg-r6g2

Apache Tomcat Denial of Service due to improper input validation vulnerability for HTTP/2 requests

CVSS 7.5 HighCriticalEPSS 0.23 · 97th percentile

Critical, because:

  • CVSS score 7.5 (7.0 or more) and EPSS 0.23 (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 13 Mar 2024, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.apache.tomcat:tomcat-coyoteMaven>=11.0.0-M1, <11.0.0-M17 || >=10.1.0-M1, <10.1.19 || >=9.0.0-M1, <9.0.86 || >=8.5.0, <8.5.9911.0.0-M17, 10.1.19, 9.0.86, 8.5.99
org.apache.tomcat.embed:tomcat-embed-coreMaven>=8.5.0, <8.5.99 || >=9.0.0-M1, <9.0.86 || >=10.1.0-M1, <10.1.19 || >=11.0.0-M1, <11.0.0-M178.5.99, 9.0.86, 10.1.19, 11.0.0-M17
Identifiers
GHSA-7w75-32cg-r6g2 · BIT-tomcat-2024-24549 · CVE-2024-24549
Weakness (CWE)
CWE-20
Tags
Published
13 Mar 2024
Updated
13 Aug 2026

Machine-written summary

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

Apache Tomcat (tomcat-coyote and tomcat-embed-core packages) versions 8.5.0 through 8.5.98, 9.0.0-M1 through 9.0.85, 10.1.0-M1 through 10.1.18, and 11.0.0-M1 through 11.0.0-M16 are affected. A remote client sending HTTP/2 requests whose headers exceed configured limits can cause denial of service, because the stream is not reset until all headers are processed. Upgrade to 8.5.99, 9.0.86, 10.1.19, 11.0.0-M17, or later in the affected line.

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 0.23, the 97th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:19 UTC First seen by agentprime
  2. 31 Oct 2026, 14:19 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.