Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Psd-Tools Project | Psd-Tools | < 1.12.2 |
Related Weaknesses (CWE)
References
- https://github.com/psd-tools/psd-tools/commit/6c0a78f195b5942757886a1863793fd594Patch
- https://github.com/psd-tools/psd-tools/releases/tag/v1.12.2ProductRelease Notes
- https://github.com/psd-tools/psd-tools/security/advisories/GHSA-24p2-j2jr-386wExploitVendor Advisory
FAQ
What is CVE-2026-27809?
CVE-2026-27809 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 th...
How severe is CVE-2026-27809?
CVE-2026-27809 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-27809?
Check the references section above for vendor advisories and patch information. Affected products include: Psd-Tools Project Psd-Tools.