Out-of-bounds Write Affecting py3-pillow package, versions <13.0.0-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.57% (48th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-PY3PILLOW-21664558
  • published24 Oct 2026
  • disclosed19 Oct 2026

Introduced: 19 Oct 2026

NewCVE-2026-112397  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Chainguard py3-pillow to version 13.0.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3-pillow package and not the py3-pillow package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's ImageMorph.MorphOp.apply() can access memory before a row buffer for a zero-width image. PPM and PGM input can create an image with width zero, and the native morphology routine indexes outrow[width - 1] without rejecting that geometry. An attacker can supply such an image to an application that applies a morphology operation. This can crash the process. This issue is fixed in version 13.0.0.

CVSS Base Scores

version 3.1