{"id":"DEBIAN-CVE-2026-123202","details":"libnxml before 0.18.6 contains a stack-based buffer overflow vulnerability in src/nxml_parser.c that allows remote attackers to write past a 1024-byte stack buffer via long XML names. Attackers can supply XML or RSS feeds with a 1022-character element, attribute, DOCTYPE or entity name ending in a multi-byte UTF-8 character to crash parsing applications.","modified":"2026-11-06T18:00:06.811253417Z","published":"2026-11-05T19:17:19.337Z","upstream":["CVE-2026-123202"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-123202"}],"affected":[{"package":{"name":"libnxml","ecosystem":"Debian:12","purl":"pkg:deb/debian/libnxml?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.18.4-1","0.18.4-2","0.18.4-2.1","0.18.4-2.1~exp1","0.18.5-1","0.18.5-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123202.json"}},{"package":{"name":"libnxml","ecosystem":"Debian:13","purl":"pkg:deb/debian/libnxml?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.18.5-1","0.18.5-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123202.json"}},{"package":{"name":"libnxml","ecosystem":"Debian:14","purl":"pkg:deb/debian/libnxml?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.18.5-1","0.18.5-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-123202.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}