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CVE-2026-27809

psd-tools: Compression module has unguarded zlib decompression, missing dimension validation, and hardening gaps PUBLISHED

Description (CNA)

psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to version 1.12.2, when a PSD file contains malformed RLE-compressed image data (e.g. a literal run that extends past the expected row size), decode_rle() raises ValueError which propagated all the way to the user, crashing psd.composite() and psd-tools export. decompress() already had a fallback that replaces failed channels with black pixels when result is None, but it never triggered because the ValueError from decode_rle() was not caught. The fix in version 1.12.2 wraps the decode_rle() call in a try/except so the existing fallback handles the error gracefully.

Affected (CNA)

Vendor / productVersions
psd-tools / psd-toolsaffected < 1.12.2

CWE

CWE-409, CWE-789, CWE-617, CWE-190, CWE-755, CWE-704

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.