SEPTEMBER 13, 2026
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Case File

CVE-2026-59197

HIGH · CVSS 8.2 EPSS 0.44% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-14 · Last synced 2026-08-13

CyberRota Analysis

AI-Generated

The Pillow Python imaging library is vulnerable to a heap out-of-bounds write due to improper validation of filter sizes in the public rank-filter API, which can lead to potential memory corruption. This vulnerability can be exploited when processing images with large odd filter sizes, posing a risk of arbitrary code execution. Developers and organizations using versions prior to 12.3.0 should prioritize upgrading to mitigate this high-severity risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-59197
Severity
HIGH
CVSS
8.2
EPSS
0.44%

Original NVD Description

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.

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