{"schema":"threatline.record/2","record":{"id":"CVE-2026-110601","aliases":[],"summary":"libsixel before 1.8.7-r1 and 1.9.0 through 1.10.5 Heap Out-of-Bounds Write via GIF","details":"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.","categories":["Unclassified"],"product":"libsixel","vendor":"saitoha","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-110601","source_modified_at":"2026-10-20T01:04:11.699Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"libsixel","vendor":"saitoha","versions":[{"version":"0","lessThan":"1.8.7-r1","status":"affected","versionType":"custom"},{"version":"1.9.0","lessThanOrEqual":"1.10.5","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-110601","source_modified_at":"2026-10-20T01:04:11.699Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"libsixel","ecosystem":null},"version":"1.8.7-r1","basis":"first unaffected version stated in the CVE record"}],"cvss":5.8,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00173,"percentile":0.06453,"score_date":"2026-10-23"},"published_at":"2026-10-14T14:16:43.022Z","modified_at":"2026-10-20T01:04:11.699Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-110601","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T01:04:11.699Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-110601","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/saitoha/libsixel/issues/220","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/saitoha/libsixel/commit/bdbab09816eb9188429c37a50b97c5e66dfe5047","tags":["patch"]},{"source":"CVE List","url":"https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1","tags":["release-notes"]},{"source":"CVE List","url":"https://github.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.c#L182-L248","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/libsixel/libsixel/blob/v1.10.5/src/fromgif.c#L219-L240","tags":["technical-description"]},{"source":"CVE List","url":"https://hackmd.io/@haind-pwn/libsixel-gif-transparent-index-oob-write","tags":["third-party-advisory"]},{"source":"CVE List","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":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-20T01:03:24.191094Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-20T01:04:11.699Z","content_hash":"f10a3c8b6220f8afa81a5ab35f416b98c03661869c848d3fd05b9f0fde83b3a9"}}