{"id":"CVE-2026-96638","revision":"d9a0d2b61aa74351a62289b21904e4f6","records":[{"revision":"d9a0d2b61aa74351a62289b21904e4f6","observedAt":"2026-10-28T19:46:48.975+00:00","statement":{"source":"cve-program","id":"CVE-2026-96638","aliases":[],"title":"Pillow: BMP RLE decoder memory-amplification DoS via unbounded delta escape / absolute mode","description":"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.","state":0,"publishedAt":"2026-10-21T20:47:21.767+00:00","modifiedAt":"2026-10-28T18:21:53.7+00:00","affected":[{"ecosystem":"Vendor product","name":"Pillow","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"python-pillow\",\n                    \"product\": \"Pillow\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 9.1.0, < 13.0.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":6.5,"severity":"MEDIUM"}],"references":["https://github.com/python-pillow/Pillow/security/advisories/GHSA-24rc-8hj2-v98c","https://github.com/python-pillow/Pillow/pull/10015","https://github.com/python-pillow/Pillow/commit/e7794835e323ff2691d9b3a974cade1a44301b9a","https://github.com/python-pillow/Pillow/releases/tag/13.0.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-96638","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-96638","identifiers":["CVE-2026-96638"]},"retained":false,"historicalAffected":[]}],"coverage":[]}