{"id":"DEBIAN-CVE-2026-79591","details":"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.","modified":"2026-09-23T09:00:10.859283096Z","published":"2026-09-10T21:17:46.933Z","upstream":["CVE-2026-79591"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-79591"}],"affected":[{"package":{"name":"r-cran-readxl","ecosystem":"Debian:12","purl":"pkg:deb/debian/r-cran-readxl?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.2-1","1.4.3-1","1.4.4-1","1.4.5-1","1.5.0-1","1.5.0.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79591.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Debian:13","purl":"pkg:deb/debian/r-cran-readxl?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1","1.5.0-1","1.5.0.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79591.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Debian:14","purl":"pkg:deb/debian/r-cran-readxl?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1","1.5.0-1","1.5.0.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-79591.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}