CVE-2026-54071

HIGH 7.8

BabelDOC: Arbitrary Code Execution via CMap Pickle Deserialization in babeldoc/pdfminer/cmapdb.py

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-502
Vendor	funstory-ai
Product	babeldoc
Published	Aug 21, 2026

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CVSS v3 Breakdown

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

funstory-ai / BabelDOC

< 0.6.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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