Memory Access Vulnerability in Pillow Python Imaging Library
CVE-2026-112397

8.7HIGH

Key Information:

Vendor

Python-pillow

Status
Pillow
Vendor
CVE Published:
19 October 2026

What is CVE-2026-112397?

The Pillow Python imaging library, prior to version 13.0.0, contains a vulnerability in its ImageMorph.MorphOp.apply() method which can enable memory access issues. Specifically, when handling zero-width images generated from PPM and PGM input, the morphology routines do not appropriately manage the image's geometry, potentially leading to accessing memory that was not meant to be accessed. This flaw can cause applications utilizing Pillow to encounter crashes when processing specially crafted images. The issue has been addressed in version 13.0.0.

Affected Version(s)

Pillow < 13.0.0

References

https://github.com/python-pillow/Pillow/security/advisori...
x_refsource_CONFIRM
https://github.com/python-pillow/Pillow/commit/18f7c0dfee...
x_refsource_MISC
https://github.com/python-pillow/Pillow/releases/tag/13.0.0
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.