# Mammoth is vulnerable to Directory Traversal

Advisory record · `GHSA-rmjr-87wv-gf87`

- **Identifiers:** `GHSA-rmjr-87wv-gf87` · `CVE-2025-11849` · `PYSEC-2026-1603`
- **State:** Confirmed
- **Severity:** CVSS 6.4 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-22](https://cwe.mitre.org/data/definitions/22.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md)
- **Published:** 17 Oct 2025
- **Updated:** 7 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 17 Oct 2025, 06:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `mammoth` (npm): affected `>=0.3.25, <1.11.0`; fixed in `1.11.0`
- `org.zwobble.mammoth:mammoth` (Maven): affected `<1.11.0`; fixed in `1.11.0`
- `mammoth` (PyPI): affected `>=0.3.25, <1.11.0`; fixed in `1.11.0`
- `Mammoth` (NuGet): affected `<1.11.0`; fixed in `1.11.0`

## 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

- 6.4 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:N/SA:H/E:P`, from CNA (snyk)

- **CISA KEV:** Not listed.
- **EPSS:** 0.011, the 66th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 17 Oct 2025. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-rmjr-87wv-gf87](https://github.com/advisories/GHSA-rmjr-87wv-gf87)
- [OSV: GHSA-rmjr-87wv-gf87](https://osv.dev/vulnerability/GHSA-rmjr-87wv-gf87)
- <https://nvd.nist.gov/vuln/detail/CVE-2025-11849>
- <https://github.com/mwilliamson/mammoth.js/commit/c54aaeb43a7941317c1f3c119ffa92090f988820>
- <https://gist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10>
- <https://github.com/mwilliamson/java-mammoth>
- <https://security.snyk.io/vuln/SNYK-DOTNET-MAMMOTH-13561968>
- <https://security.snyk.io/vuln/SNYK-JAVA-ORGZWOBBLEMAMMOTH-13561969>
- <https://security.snyk.io/vuln/SNYK-JS-MAMMOTH-13554470>
- <https://security.snyk.io/vuln/SNYK-PYTHON-MAMMOTH-13561967>

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-rmjr-87wv-gf87>, 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-rmjr-87wv-gf87/>. Everything for agents: <https://agentprime.io/llms.txt>.