CVE-2026-112390

High

Description

Pillow is a Python imaging library. From 7.2.0 until 13.0.0, Pillow can enter an infinite loop while determining the frame count of a MIC image. MicImageFile inherits TIFF frame traversal, but MicImageFile.tell reports the OLE stream index and its seek() resets TIFF frame state, so an embedded TIFF with at least three IFDs never advances. When an application with olefile installed reads n_frames or saves all frames from a crafted MIC file, the non-advancing traversal can hold a worker at full CPU indefinitely. This issue is fixed in version 13.0.0.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Python Pillow

PublishedOct 19, 2026

First seenOct 19, 2026

Weakness typeCWE-835CWE-835

How to fix

Update

python pillow13.0.0 or later
pillow13.0.0 or later

Affected products

Product	Affected versions	Fixed in
python pillow	7.2.0 ≤ v < 13.0.0	13.0.0
pillowPyPI	7.2.0 ≤ v < 13.0.0	13.0.0

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