# Apache Tomcat - Denial of Service

Advisory record · `GHSA-wm9w-rjj3-j356`

- **Identifiers:** `GHSA-wm9w-rjj3-j356` · `BIT-tomcat-2024-34750` · `CVE-2024-34750`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-400](https://cwe.mitre.org/data/definitions/400.html) · [CWE-755](https://cwe.mitre.org/data/definitions/755.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md) · [CWE-755](https://agentprime.io/advisories/tag/cwe-755.md)
- **Published:** 3 Jul 2024
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

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.

## Affected packages

- `org.apache.tomcat.embed:tomcat-embed-core` (Maven): affected `>=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, <=8.5.100`; fixed in `11.0.0-M21`, `10.1.25`, `9.0.90`
- `org.apache.tomcat:tomcat-coyote` (Maven): affected `>=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, <=8.5.100`; fixed in `11.0.0-M21`, `10.1.25`, `9.0.90`

## 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

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from 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

- 31 Oct 2026, 14:17 UTC: First seen by agentprime
- 31 Oct 2026, 14:17 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-wm9w-rjj3-j356)

## Sources

- [GitHub Advisory Database: GHSA-wm9w-rjj3-j356](https://github.com/advisories/GHSA-wm9w-rjj3-j356)
- [OSV: GHSA-wm9w-rjj3-j356](https://osv.dev/vulnerability/GHSA-wm9w-rjj3-j356)
- <https://nvd.nist.gov/vuln/detail/CVE-2024-34750>
- <https://github.com/apache/tomcat/commit/2344a4c0d03e307ba6b8ab6dc8b894cc8bac63f2>
- <https://github.com/apache/tomcat/commit/2afae300c9ac9c0e516e2e9de580847d925365c3>
- <https://github.com/apache/tomcat/commit/9fec9a82887853402833a80b584e3762c7423f5f>
- <https://github.com/apache/tomcat>
- <https://lists.apache.org/thread/4kqf0bc9gxymjc2x7v3p7dvplnl77y8l>
- <https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html>
- <https://security.netapp.com/advisory/ntap-20240816-0004>
- <https://tomcat.apache.org/security-10.html>
- <https://tomcat.apache.org/security-11.html>
- <https://tomcat.apache.org/security-9.html>

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.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-wm9w-rjj3-j356>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-wm9w-rjj3-j356/>. Everything for agents: <https://agentprime.io/llms.txt>.