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VULNERABILITIES

CVE-2026-96644 Details

Description

Pillow is a Python imaging library. Prior to 13.0.0 on Windows, src/PIL/WmfImagePlugin.py passes unchecked 32-bit WMF or EMF dimensions to the native drawwmf handler in src/display.c. The handler sizes a DIB allocation from 16-bit-truncated bcWidth and bcHeight fields but copies pixel data using the original full dimensions. A crafted wide, short metafile can pass the pixel-count decompression-bomb check and make the Windows-only renderer read beyond the heap buffer, potentially disclosing memory or crashing the process. This issue is fixed in version 13.0.0.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj CISA-ADPVendor Advisory
https://github.com/python-pillow/Pillow/commit/4cf46bee338304c5c8968fd7f132ba0d40c428b7 [email protected]Patch
https://github.com/python-pillow/Pillow/pull/10120 [email protected]Issue Tracking
https://github.com/python-pillow/Pillow/releases/tag/13.0.0 [email protected]Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-125Out-of-bounds Read[email protected]

Affected Products

ProductVersions
python pillow
< 13.0.0

CPE

  • cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
microsoft windows
All versions

CPE

  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-96644
NVD Published Date:
Oct 21, 2026
NVD Last Modified:
Oct 28, 2026
Source:
[email protected]
CVE-2026-96644 Details - Not Deferred