GHSA-gg2r-wvfm-q9rx: pillow (CVE-2026-112892)

Package	Ecosystem	Affected	Fixed in
pillow	PyPI	>=4.1.0, <13.0.0	13.0.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Pillow versions from 4.1.0 before 13.0.0 are affected by a flaw in the MSP RLE decoder, which expands run-length data into an in-memory buffer without a limit tied to the declared image size. A small crafted MSP file can force very large memory allocation when an application loads its pixels, causing a denial of service; the source notes that the pixel-count limit does not bound this expansion. Upgrade to Pillow 13.0.0 or later, which contains the fix.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	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	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0050, the 43rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:07 UTC First seen by agentprime
31 Oct 2026, 14:07 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.