{"id":"CVE-2026-110601","published":"2026-10-14T15:17:11.530","lastModified":"2026-10-16T19:18:44.867","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.","cvssScore":6.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H","cwes":["CWE-787"],"vendors":[],"products":[],"references":[{"url":"https://github.com/libsixel/libsixel/blob/v1.10.5/src/fromgif.c#L219-L240","tags":[]},{"url":"https://github.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.c#L182-L248","tags":[]},{"url":"https://github.com/saitoha/libsixel/commit/bdbab09816eb9188429c37a50b97c5e66dfe5047","tags":[]},{"url":"https://github.com/saitoha/libsixel/issues/220","tags":[]},{"url":"https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1","tags":[]},{"url":"https://hackmd.io/@haind-pwn/libsixel-gif-transparent-index-oob-write","tags":[]},{"url":"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","tags":[]}],"exploitRefs":[{"url":"https://github.com/libsixel/libsixel/blob/v1.10.5/src/fromgif.c#L219-L240","tags":[]},{"url":"https://github.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.c#L182-L248","tags":[]},{"url":"https://github.com/saitoha/libsixel/commit/bdbab09816eb9188429c37a50b97c5e66dfe5047","tags":[]},{"url":"https://github.com/saitoha/libsixel/issues/220","tags":[]},{"url":"https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1","tags":[]}],"hasPoc":true,"ai":null}