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.
References
Configurations
Configuration 1 (hide)
| AND |
|
History
28 Oct 2026, 19:19
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj - Vendor Advisory |
27 Oct 2026, 14:27
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/python-pillow/Pillow/commit/4cf46bee338304c5c8968fd7f132ba0d40c428b7 - Patch | |
| References | () https://github.com/python-pillow/Pillow/pull/10120 - Issue Tracking | |
| References | () https://github.com/python-pillow/Pillow/releases/tag/13.0.0 - Release Notes | |
| References | () https://github.com/python-pillow/Pillow/security/advisories/GHSA-9v9v-9qvf-h2hj - Vendor Advisory | |
| CPE | cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:* |
|
| First Time |
Microsoft windows
Microsoft Python pillow Python |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 8.1 |
21 Oct 2026, 21:20
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-21 21:20
Updated : 2026-10-28 19:19
NVD link : CVE-2026-96644
Mitre link : CVE-2026-96644
CVE.ORG link : CVE-2026-96644
JSON object : View
Products Affected
microsoft
- windows
python
- pillow
CWE
CWE-125
Out-of-bounds Read
