Infinite Loop Vulnerability in Pillow Python Imaging Library
CVE-2026-112390

8.2HIGH

Key Information:

Vendor

Python-pillow

Status
Pillow
Vendor
CVE Published:
19 October 2026

What is CVE-2026-112390?

The Pillow library, a popular Python imaging tool, features a vulnerability that can lead to an infinite loop when processing MIC images with multiple IFDs. This occurs because the MicImageFile's traversal for TIFF frames does not advance correctly when attempting to utilize the tell() method, particularly in the presence of at least three IFDs. Consequently, applications utilizing the olefile package may experience sustained high CPU usage when fetching frame counts or saving frames from specially crafted MIC files. This issue has been addressed in Pillow version 13.0.0.

Affected Version(s)

Pillow >= 7.2.0, < 13.0.0

References

https://github.com/python-pillow/Pillow/security/advisori...
x_refsource_CONFIRM
https://github.com/python-pillow/Pillow/commit/26cb3ed061...
x_refsource_MISC
https://github.com/python-pillow/Pillow/releases/tag/13.0.0
x_refsource_MISC

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.