# Apache Tomcat: Unbounded read in WebDAV LOCK and PROPFIND handling

Advisory record · `GHSA-gx5v-xp9w-j4cg`

- **Identifiers:** `GHSA-gx5v-xp9w-j4cg` · `BIT-tomcat-2026-41284` · `CVE-2026-41284`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **Weakness (CWE):** [CWE-770](https://cwe.mitre.org/data/definitions/770.html)
- **Tags:** [Denial of service](https://agentprime.io/advisories/tag/dos.md)
- **Published:** 12 May 2026
- **Updated:** 11 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 12 May 2026, 18:30 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 `<9.0.118 || >=10.1.0-M1, <10.1.55 || >=11.0.0-M1, <11.0.22`; fixed in `9.0.118`, `10.1.55`, `11.0.22`
- `org.apache.tomcat:tomcat` (Maven): affected `<9.0.118 || >=10.1.0-M1, <10.1.55 || >=11.0.0-M1, <11.0.22`; fixed in `9.0.118`, `10.1.55`, `11.0.22`
- `org.apache.tomcat:tomcat-catalina` (Maven): affected `<9.0.118 || >=10.1.0-M1, <10.1.55 || >=11.0.0-M1, <11.0.22`; fixed in `9.0.118`, `10.1.55`, `11.0.22`

## Machine-written summary

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

> Apache Tomcat (tomcat-embed-core, tomcat, and tomcat-catalina) is affected in versions 9.0.0.M1 to 9.0.117, 10.1.0-M1 to 10.1.54, and 11.0.0-M1 to 11.0.21. Tomcat does not limit the request body size for WebDAV LOCK and PROPFIND requests, which unauthenticated users can send. Upgrade to 9.0.118, 10.1.55, or 11.0.22 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

- 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:** 0.0084, the 58th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:16 UTC: First seen by agentprime
- 31 Oct 2026, 14:16 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-gx5v-xp9w-j4cg)

## Sources

- [GitHub Advisory Database: GHSA-gx5v-xp9w-j4cg](https://github.com/advisories/GHSA-gx5v-xp9w-j4cg)
- [OSV: GHSA-gx5v-xp9w-j4cg](https://osv.dev/vulnerability/GHSA-gx5v-xp9w-j4cg)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-41284>
- <https://github.com/apache/tomcat/commit/17dacd9aa48628da2eba37a9ab743c0b6c71685c>
- <https://github.com/apache/tomcat/commit/a96fffd18487a29c0a30d36f00cb2b2d91f6d42c>
- <https://github.com/apache/tomcat/commit/b3d1c1c239142e806be0b7329d304b94a58913ed>
- <https://github.com/apache/tomcat>
- <https://lists.apache.org/thread/2nvqjr7ovjmvx2vbhb7s61ycd5msc8qc>
- <https://tomcat.apache.org/security-10.html>
- <https://tomcat.apache.org/security-11.html>
- <https://tomcat.apache.org/security-9.html>
- <http://www.openwall.com/lists/oss-security/2026/05/12/12>

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-gx5v-xp9w-j4cg>, 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-gx5v-xp9w-j4cg/>. Everything for agents: <https://agentprime.io/llms.txt>.