{"id":"CVE-2026-110601","revision":"e1a9a65d1d2f4b5c94b348b6018e7dfb","records":[{"revision":"e1a9a65d1d2f4b5c94b348b6018e7dfb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-110601","aliases":[],"title":"libsixel before 1.8.7-r1 and 1.9.0 through 1.10.5 Heap Out-of-Bounds Write via GIF","description":"libsixel before 1.8.7-r1 and 1.9.0 through 1.10.5 contains a heap out-of-bounds write vulnerability in gif_init_frame() in src/fromgif.c, which never checks the GIF transparent color index against the palette size. Attackers can supply a crafted GIF with a small color table and large transparent index, processed with a background color set, to write bytes past the palette buffer, causing heap corruption or crashes.","state":0,"publishedAt":"2026-10-14T14:16:43.022+00:00","modifiedAt":"2026-10-20T01:04:11.699+00:00","affected":[{"ecosystem":"https://github.com","name":"libsixel","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"saitoha\",\n                    \"product\": \"libsixel\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"1.8.7-r1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        },\n                        {\n                            \"version\": \"1.9.0\",\n                            \"lessThanOrEqual\": \"1.10.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:github/saitoha/libsixel\",\n                    \"collectionURL\": \"https://github.com\",\n                    \"repo\": \"https://github.com/saitoha/libsixel\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","score":5.8,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/saitoha/libsixel/issues/220","https://github.com/saitoha/libsixel/commit/bdbab09816eb9188429c37a50b97c5e66dfe5047","https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1","https://github.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.c#L182-L248","https://github.com/libsixel/libsixel/blob/v1.10.5/src/fromgif.c#L219-L240","https://hackmd.io/@haind-pwn/libsixel-gif-transparent-index-oob-write","https://www.vulncheck.com/advisories/libsixel-before-1.8.7-r1-and-1.9.0-through-1.10.5-heap-out-of-bounds-write-via-gif"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110601","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110601","identifiers":["CVE-2026-110601"]},"retained":false,"historicalAffected":[]}],"coverage":[]}