CVE-2026-112395: python-pillow pillow Heap-based Buffer Overflow

Vulnerability summary

CVE-2026-112395 is a medium (CVSS 6.5) Heap-based Buffer Overflow vulnerability in python-pillow pillow.

Timeline

1. 19-10-2026
   PublishedVulnerability first disclosed.

Description

Pillow is a Python imaging library. From 8.2.0 until 13.0.0, Pillow's tiled-TIFF decoder can read past the tile buffer while copying four-byte pixels. In _decodeTile, libtiff can return a tile allocation smaller than the required row stride multiplied by the tile length, and Pillow's stride-and-copy loop walks beyond that allocation. An attacker can supply a crafted tiled TIFF to an application that loads it. This can expose adjacent heap data in pixels or crash the process. This issue is fixed in version 13.0.0.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().