{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-110601", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-14T13:07:20.557Z", "datePublished": "2026-10-14T14:16:43.022Z", "dateUpdated": "2026-10-14T14:16:43.022Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-14T14:16:43.022Z"}, "datePublic": "2026-03-04T00:00:00.000Z", "title": "libsixel before 1.8.7-r1 and 1.9.0 through 1.10.5 Heap Out-of-Bounds Write via GIF", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Out-of-bounds Write", "cweId": "CWE-787", "type": "CWE"}]}], "affected": [{"vendor": "saitoha", "product": "libsixel", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "1.8.7-r1", "status": "affected", "versionType": "custom"}, {"version": "1.9.0", "lessThanOrEqual": "1.10.5", "status": "affected", "versionType": "custom"}], "packageURL": "pkg:github/saitoha/libsixel", "collectionURL": "https://github.com", "repo": "https://github.com/saitoha/libsixel"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:saitoha:libsixel:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.8.7-r1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:saitoha:libsixel:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.9.0", "versionEndIncluding": "1.10.5"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.8, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 6.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/saitoha/libsixel/issues/220", "tags": ["issue-tracking"]}, {"url": "https://github.com/saitoha/libsixel/commit/bdbab09816eb9188429c37a50b97c5e66dfe5047", "tags": ["patch"]}, {"url": "https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1", "tags": ["release-notes"], "name": "libsixel v1.8.7-r1 Release Notes"}, {"url": "https://github.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.c#L182-L248", "tags": ["technical-description"]}, {"url": "https://github.com/libsixel/libsixel/blob/v1.10.5/src/fromgif.c#L219-L240", "tags": ["technical-description"]}, {"url": "https://hackmd.io/@haind-pwn/libsixel-gif-transparent-index-oob-write", "tags": ["third-party-advisory"]}, {"name": "VulnCheck Advisory: 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"], "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"}], "credits": [{"lang": "en", "value": "ShangzhiXu", "type": "finder"}, {"lang": "en", "value": "HaiND from the Post and Telecommunication Institute of Technology", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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