CVE WatchSep 22, 2026

CVE-2026-59991

psd-tools is a Python package for working with Adobe Photoshop PSD files. Prior to 1.17.4, PSDImage.composite() and PSDImage.numpy() allocat

CVSS

7.5

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 22, 2026 · Last modified: Sep 22, 2026 · CWE-789

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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