Deserialization in Funstory-Ai Babeldoc
CVE-2026-54071
BabelDOC is a document translation tool. Prior to 0.6.3, BabelDOC's vendored PDF parser in babeldoc/pdfminer/cmapdb.py deserializes untrusted pickle data when CMapDB._load_data() loads CMap files. PDF-controlled Encoding or CMapName values and embedded PostScript usecmap operators can reach this sink after path separators are decoded, while _normalize_cmap_name() removes only a leading slash. Absolute paths or traversal sequences can escape the trusted CMap directories through os.path.join(), select an attacker-writable .pickle.gz file, and cause pickle.loads() to execute arbitrary Python code with the privileges of the BabelDOC process. This issue is fixed in version 0.6.3.
Vulnerability class: Insecure Deserialization
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Funstory-ai Babeldoc — versions < 0.6.3
Weakness classification (CWE)
References
- https://github.com/funstory-ai/BabelDOC/blob/main/docs/release-notes/v0.6.3.md (x_refsource_MISC)
- https://github.com/funstory-ai/BabelDOC/commit/28f784ca6b437dbba040bfd9c67110373cd0924b (x_refsource_MISC)
- https://github.com/funstory-ai/BabelDOC/releases/tag/v0.6.3 (x_refsource_MISC)
- https://github.com/funstory-ai/BabelDOC/security/advisories/GHSA-m8gf-v64p-gfmg (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-54071?
- CVE-2026-54071 is a high-severity vulnerability in Funstory-Ai Babeldoc, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2026-08-21.
- How severe is CVE-2026-54071?
- High severity. CVSS v3 base score is 7.8 out of 10.