CVE-2025-11849
Versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth from 0.3.25 and before 1.11.0; versions of the package mammoth before 1.11.0; versions of the package org.zwobble.mammoth:mammoth before 1.11.0 are vulnerable to Directory Traversal due to the lack of path or file type validation when processing a docx file containing an image with an external link (r:link attribute instead of embedded r:embed). The library resolves the URI to a file path and after reading, the content is encoded as base64 and included in the HTML output as a data URI. An attacker can read arbitrary files on the system where the conversion is performed or cause an excessive resources consumption by crafting a docx file that links to special device files such as /dev/random or /dev/zero.
- CVSS 4.0
- 5.4
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 - CVSS 3.1
- 9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:H - EPSS
- 1.1% chance of exploitation in the next 30 days; higher than 66% of CVEs (scores of 2026-10-25)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-rmjr-87wv-gf87 | npm | mammoth | >=0.3.25 <1.11.0 | 1.11.0 |
| GHSA-rmjr-87wv-gf87 | Maven | org.zwobble.mammoth:mammoth | <1.11.0 | 1.11.0 |
| GHSA-rmjr-87wv-gf87 | PyPI | mammoth | >=0.3.25 <1.11.0 | 1.11.0 |
| GHSA-rmjr-87wv-gf87 | NuGet | Mammoth | <1.11.0 | 1.11.0 |
| PYSEC-2026-1603 | PyPI | mammoth | >=0.3.25 <1.11.0 | 1.11.0 |
References
- https://gist.github.com/AudunWA/4d690d9ae5efdafe7cf71d9c2ee90a10
- https://github.com/mwilliamson/mammoth.js/commit/c54aaeb43a7941317c1f3c119ffa92090f988820
- 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