Pillow is a Python imaging library. From 4.1.0 until 13.0.0, Pillow's MSP RLE decoder can expand a small file into an unbounded in-memory buffer. The decoder writes run-length output to BytesIO without limiting expansion to the declared image size. An attacker can supply a crafted MSP image to an application that loads its pixels. This can exhaust memory and deny service even when the declared pixel count passes the decompression-bomb check. This issue is fixed in version 13.0.0.

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Mon, 19 Oct 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Python-pillow
Python-pillow pillow
Vendors & Products Python-pillow
Python-pillow pillow

Mon, 19 Oct 2026 21:45:00 +0000

Type Values Removed Values Added
Description Pillow is a Python imaging library. From 4.1.0 until 13.0.0, Pillow's MSP RLE decoder can expand a small file into an unbounded in-memory buffer. The decoder writes run-length output to BytesIO without limiting expansion to the declared image size. An attacker can supply a crafted MSP image to an application that loads its pixels. This can exhaust memory and deny service even when the declared pixel count passes the decompression-bomb check. This issue is fixed in version 13.0.0.
Title Pillow: MSP RLE decoder expands a tiny file into unbounded memory
Weaknesses CWE-409
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-19T21:35:25.797Z

Reserved: 2026-10-19T20:16:09.856Z

Link: CVE-2026-112892

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-19T22:17:09.210

Modified: 2026-10-19T22:17:09.210

Link: CVE-2026-112892

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T01:15:06Z

Weaknesses