{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2026-79591", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2026-09-10T20:40:06.703Z", "dateReserved": "2026-08-25T00:00:00.000Z", "datePublished": "2026-09-10T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2026-09-10T20:40:06.703Z"}, "descriptions": [{"lang": "en", "value": "A heap-buffer-overflow and use-after-free vulnerability exists in the xls_getCSS() function of libxls 1.6.3 due to insufficient validation of a file-controlled font index."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "https://github.com/libxls/libxls/issues/161"}, {"url": "https://github.com/libxls/libxls/pull/164/changes/902c8f9b13710c3a13b6232fb86626c5c729402c"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}}, "dataVersion": "5.2"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A heap-buffer-overflow and use-after-free vulnerability exists in the xls_getCSS() function of libxls 1.6.3 due to insufficient validation of a file-controlled font index."}], "id": "CVE-2026-79591", "lastModified": "2026-09-10T21:17:46.933", "metrics": {}, "published": "2026-09-10T21:17:46.933", "references": [{"source": "cve@mitre.org", "url": "https://github.com/libxls/libxls/issues/161"}, {"source": "cve@mitre.org", "url": "https://github.com/libxls/libxls/pull/164/changes/902c8f9b13710c3a13b6232fb86626c5c729402c"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "1.6.3"}}], "enrichment": {"confidence": 80.0, "confidence_source": "inferred", "scores": [{"score": 80.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "libxls", "vendor": "libxls"}], "created": "2026-09-10T22:45:10.559008+00:00", "title": "Heap Buffer Overflow and Use\u2011After\u2011Free in libxls xls_getCSS Function", "updated": "2026-09-11T13:00:14.644867+00:00", "vendors": ["libxls", "libxls$PRODUCT$libxls"], "weaknesses": ["CWE-122", "CWE-416"]}