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Vulnerability record · CVE-2026-54071 · published 21 August 2026

CVE-2026-54071: Deserialization of untrusted data vulnerability

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.

7.8 CVSS 3.1 High EPSS 0.38% · top 70.7% CWE-502 · Deserialization of untrusted data Received
7.8CVSS 3.1 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
21 Aug 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
https://github.com/funstory-ai/BabelDOC/blob/main/docs/release-notes/v0.6.3.md
https://github.com/funstory-ai/BabelDOC/commit/28f784ca6b437dbba040bfd9c67110373cd0924b
https://github.com/funstory-ai/BabelDOC/releases/tag/v0.6.3
https://github.com/funstory-ai/BabelDOC/security/advisories/GHSA-m8gf-v64p-gfmg

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Source: NIST National Vulnerability Database (record CVE-2026-54071), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.