CVE-2026-59197

Updated on 14 Jul 2026

Severity

8.2 High severity

Details

CVSS score
8.2
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Overview

About vulnerability

Pillow is a Python imaging library. Prior to 12.3.0, Pillow’s public rank-filter API can trigger a native heap out-of-bounds write when given a very large odd filter size because ImageFilter.RankFilter.filter() calls image.expand(size // 2, size // 2) before rank-filter size validation and ImagingExpand() computes output dimensions with unchecked signed int arithmetic. This issue is fixed in version 12.3.0.

Details

Affected product:
pillow
Affected packages:
pillow @ 9.5.0 (+5 more)

Fixes