{"id":"CVE-2026-110601","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-110601","generatedAt":"2026-10-28T03:59:07.881Z","title":"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.","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.","published":"2026-10-14T15:17:12.000Z","lastModified":"2026-10-20T01:17:11.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":5.8,"severity":"MEDIUM","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-787"],"affected":[],"epss":{"score":0.00236,"percentile":0.14554,"date":"2026-10-27","history":[{"date":"2026-10-15","score":0.00173,"percentile":0.06322}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-14T15:17:12.000Z","detail":{"score":"5.8","severity":"MEDIUM","publishedAt":"2026-10-14T15:17:11.530Z"},"summary":"New CVE, medium severity (CVSS 5.8)."}],"references":[{"url":"https://github.com/libsixel/libsixel/blob/v1.10.5/src/fromgif.c#L219-L240","source":"disclosure@vulncheck.com"},{"url":"https://github.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.c#L182-L248","source":"disclosure@vulncheck.com"},{"url":"https://github.com/saitoha/libsixel/commit/bdbab09816eb9188429c37a50b97c5e66dfe5047","source":"disclosure@vulncheck.com"},{"url":"https://github.com/saitoha/libsixel/issues/220","source":"disclosure@vulncheck.com"},{"url":"https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1","source":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/libsixel-gif-transparent-index-oob-write","source":"disclosure@vulncheck.com"},{"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","source":"disclosure@vulncheck.com"},{"url":"https://github.com/saitoha/libsixel/issues/220","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-110601","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}