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CVE-2026-42311— Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)

Quick assessment

Affected
python-pillow Pillow
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.

Pillow是Pillow开源的一款基于Python的图像处理库。 Pillow 10.3.0版本至12.2.0之前版本存在输入验证错误漏洞，该漏洞源于处理恶意PSD文件可能导致内存损坏，可能导致崩溃或任意代码执行。

AI Predicted 8.6 Difficulty: Easy EPSS 0.22% · P11

Affected Version Matrix 1

VendorProduct Version RangeStatus
python-pillow Pillow >= 10.3.0, < 12.2.0 affected
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I. Basic Information for CVE-2026-42311

Vulnerability Information
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Vulnerability Title
Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)
Source: CVE Program / CVE List V5
Vulnerability Description
Pillow is a Python imaging library. From version 10.3.0 to before version 12.2.0, processing a malicious PSD file could lead to memory corruption, potentially resulting in a crash or arbitrary code execution. This issue has been patched in version 12.2.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Pillow 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Pillow是Pillow开源的一款基于Python的图像处理库。 Pillow 10.3.0版本至12.2.0之前版本存在输入验证错误漏洞，该漏洞源于处理恶意PSD文件可能导致内存损坏，可能导致崩溃或任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
python-pillow Pillow >= 10.3.0, < 12.2.0 -

II. Public POCs for CVE-2026-42311

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III. Intelligence Information for CVE-2026-42311

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Patches & Fixes for CVE-2026-42311 (3)

Vendor Advisories for CVE-2026-42311 (1)

Same Patch Batch · python-pillow · 2026-05-09 · 4 CVEs total

CVE-2026-42308 Pillow: Integer overflow when processing fonts
CVE-2026-42310 Pillow: PDF Parsing Trailer Infinite Loop (DoS)
CVE-2026-42309 Pillow: Heap buffer overflow with nested list coordinates

IV. Related Vulnerabilities

Same product: Pillow
Same vendor: python-pillow
Same weakness: CWE-190

V. Comments for CVE-2026-42311

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