CVE-2026-59991

Description

psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to 1.17.4, PSDImage.composite() and PSDImage.numpy() allocated output buffers from attacker-controlled PSD header geometry, including width, height, channels, depth, and per-layer rectangles, before validating those values against the available file data. A tiny crafted PSD could therefore cause multi-gigabyte memory allocation, and PSDImage.composite() could return a black image with only a warning instead of raising an exception. Services that composite untrusted PSD files could be terminated by out-of-memory handling. This issue is fixed in version 1.17.4.

References

• https://github.com/psd-tools/psd-tools/commit/a3d9a53ad51e667b5772a4f636ca6f2e16f4b271
• https://github.com/psd-tools/psd-tools/releases/tag/v1.17.4
• https://github.com/psd-tools/psd-tools/security/advisories/GHSA-8q6g-vjhf-jp8m
• https://github.com/psd-tools/psd-tools/security/advisories/GHSA-8q6g-vjhf-jp8m