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CVE-2026-59991— psd-tools: Uncontrolled memory allocation in psd-tools composite/numpy via crafted PSD geometry

Quick assessment

Affected
psd-tools psd-tools
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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

CVSS 7.5 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
psd-tools psd-tools < 1.17.4 affected
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I. Basic Information for CVE-2026-59991

Vulnerability Information

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Vulnerability Title
psd-tools: Uncontrolled memory allocation in psd-tools composite/numpy via crafted PSD geometry
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的内存分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
psd-tools psd-tools < 1.17.4 -

II. Public POCs for CVE-2026-59991

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III. Intelligence Information for CVE-2026-59991

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Other References for CVE-2026-59991 (3)

IV. Related Vulnerabilities

Same product: psd-tools
Same vendor: psd-tools
Same weakness: CWE-789

V. Comments for CVE-2026-59991

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