Improper Handling of Highly Compressed Data (Data Amplification) Affecting python3x-pillow package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.28% (20th percentile)

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  • Snyk IDSNYK-RHEL10-PYTHON3XPILLOW-21407945
  • published22 Oct 2026
  • disclosed21 Oct 2026

Introduced: 21 Oct 2026

NewCVE-2026-96638  (opens in a new tab)
CWE-409  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 python3x-pillow.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3x-pillow package and not the python3x-pillow package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

Pillow is a Python imaging library. From 9.1.0 until 13.0.0, BmpRleDecoder.decode() in src/PIL/BmpImagePlugin.py permits crafted RLE BMP delta escapes and absolute-mode runs to append beyond the remaining dest_length without a per-branch cap. A delta can add roughly 255 image rows in one iteration, so a kilobyte-sized file with a large but permitted width can expand the data bytearray to hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.

CVSS Base Scores

version 3.1