{"id":"CVE-2026-112892","title":"Pillow: MSP RLE decoder expands a tiny file into unbounded memory","summary":"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 …","severity":"high","cvss":8.7,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-409"],"vendor":"python-pillow","product":"Pillow","affected":["Pillow >= 4.1.0, < 13.0.0"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T21:35:25.797Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112892","references":[{"url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-gg2r-wvfm-q9rx","label":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-gg2r-wvfm-q9rx"},{"url":"https://github.com/python-pillow/Pillow/commit/5dcb630b9798efd91929cb873d677aeee6ed0bb3","label":"https://github.com/python-pillow/Pillow/commit/5dcb630b9798efd91929cb873d677aeee6ed0bb3"},{"url":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0","label":"https://github.com/python-pillow/Pillow/releases/tag/13.0.0"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T21:43:56.112Z","slug":"CVE-2026-112892","body":"## Overview\n\nPillow 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.\n\n## Affected\n\n- `Pillow >= 4.1.0, < 13.0.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}