CVE-2026-27809psd-tools: Compression module has unguarded zlib decompression, missing dimension validation, and hardening gaps
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 6.8 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
- Weakness (CWE)
- CWE-409, CWE-789, CWE-617, CWE-190, CWE-755, CWE-704
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Feb 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
psd-tools psd-tools psd_tools:psd_tools (from the name) | before 1.12.2 | CNA record |
psd-tools_project psd-tools psd-tools_project:psd-tools | before 1.12.2 | NVD |
References
- https://github.com/psd-tools/psd-tools/security/advisories/GHSA-24p2-j2jr-386wx-refsource-confirm, exploit, vendor-advisory
- https://github.com/psd-tools/psd-tools/commit/6c0a78f195b5942757886a1863793fd5946c1fb1x-refsource-misc, patch
- https://github.com/psd-tools/psd-tools/releases/tag/v1.12.2x-refsource-misc, product, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.