CVE-2026-54071

High

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.

SeverityHigh

CVSS7.8

Exploit probability—

ProductBabeldoc

PublishedAug 21, 2026

First seenAug 21, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update

babeldoc0.6.3 or later

Affected products

Product	Affected versions	Fixed in
babeldocPyPI	v < 0.6.3	0.6.3

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