{"id":"DEBIAN-CVE-2026-74860","details":"A flaw was found in libxml2 with Python bindings enabled. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing a Document Type Definition (DTD) with enumerated attribute values. This triggers a double-free error in the SAX attributeDecl callback handler, where a string is freed twice. This flaw can lead to a denial of service (DoS) due to a reproducible crash in Python applications using the libxml2 SAX bindings.","modified":"2026-09-29T08:47:25.683556349Z","published":"2026-09-08T12:16:58.083Z","upstream":["CVE-2026-74860"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-74860"}],"affected":[{"package":{"name":"libxml2","ecosystem":"Debian:12","purl":"pkg:deb/debian/libxml2?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.3+dfsg-0exp1","2.12.5+dfsg-0exp1","2.12.6+dfsg-0exp1","2.12.6+dfsg-0exp2","2.12.7+dfsg+really2.9.14-0.1","2.12.7+dfsg+really2.9.14-0.2","2.12.7+dfsg+really2.9.14-0.3","2.12.7+dfsg+really2.9.14-0.4","2.12.7+dfsg+really2.9.14-1","2.12.7+dfsg+really2.9.14-2","2.12.7+dfsg+really2.9.14-2.1","2.12.7+dfsg-1","2.12.7+dfsg-2","2.12.7+dfsg-3","2.13.1+dfsg-0exp1","2.13.3+dfsg-0exp1","2.13.3+dfsg-0exp2","2.14.1+dfsg-0exp1","2.14.2+dfsg-0exp1","2.14.3+dfsg-0exp1","2.14.3+dfsg-0exp2","2.14.3+dfsg-0exp3","2.14.4+dfsg-0exp1","2.14.5+dfsg-0.1","2.14.5+dfsg-0.2","2.14.5+dfsg-0exp1","2.14.5+dfsg-0exp2","2.14.6+dfsg-0.1","2.15.0+dfsg-0.1","2.15.0+dfsg-0.2","2.15.0+dfsg-0.3","2.15.1+dfsg-0.1","2.15.1+dfsg-0.2","2.15.1+dfsg-0.3","2.15.1+dfsg-0.4","2.15.1+dfsg-0.5","2.15.1+dfsg-1","2.15.1+dfsg-2","2.15.2+dfsg-0.1","2.15.3+dfsg-1","2.15.4+dfsg-1","2.9.14+dfsg-1.2","2.9.14+dfsg-1.3","2.9.14+dfsg-1.3~deb12u1","2.9.14+dfsg-1.3~deb12u2","2.9.14+dfsg-1.3~deb12u3","2.9.14+dfsg-1.3~deb12u4","2.9.14+dfsg-1.3~deb12u5","2.9.14+dfsg-1.3~deb12u6"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-74860.json"}},{"package":{"name":"libxml2","ecosystem":"Debian:13","purl":"pkg:deb/debian/libxml2?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.12.7+dfsg+really2.9.14-2.1","2.12.7+dfsg+really2.9.14-2.1+deb13u1","2.12.7+dfsg+really2.9.14-2.1+deb13u2","2.12.7+dfsg+really2.9.14-2.1+deb13u3","2.13.1+dfsg-0exp1","2.13.3+dfsg-0exp1","2.13.3+dfsg-0exp2","2.14.1+dfsg-0exp1","2.14.2+dfsg-0exp1","2.14.3+dfsg-0exp1","2.14.3+dfsg-0exp2","2.14.3+dfsg-0exp3","2.14.4+dfsg-0exp1","2.14.5+dfsg-0.1","2.14.5+dfsg-0.2","2.14.5+dfsg-0exp1","2.14.5+dfsg-0exp2","2.14.6+dfsg-0.1","2.15.0+dfsg-0.1","2.15.0+dfsg-0.2","2.15.0+dfsg-0.3","2.15.1+dfsg-0.1","2.15.1+dfsg-0.2","2.15.1+dfsg-0.3","2.15.1+dfsg-0.4","2.15.1+dfsg-0.5","2.15.1+dfsg-1","2.15.1+dfsg-2","2.15.2+dfsg-0.1","2.15.3+dfsg-1","2.15.4+dfsg-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-74860.json"}},{"package":{"name":"libxml2","ecosystem":"Debian:14","purl":"pkg:deb/debian/libxml2?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.15.3+dfsg-1"}]}],"versions":["2.12.7+dfsg+really2.9.14-2.1","2.13.1+dfsg-0exp1","2.13.3+dfsg-0exp1","2.13.3+dfsg-0exp2","2.14.1+dfsg-0exp1","2.14.2+dfsg-0exp1","2.14.3+dfsg-0exp1","2.14.3+dfsg-0exp2","2.14.3+dfsg-0exp3","2.14.4+dfsg-0exp1","2.14.5+dfsg-0.1","2.14.5+dfsg-0.2","2.14.5+dfsg-0exp1","2.14.5+dfsg-0exp2","2.14.6+dfsg-0.1","2.15.0+dfsg-0.1","2.15.0+dfsg-0.2","2.15.0+dfsg-0.3","2.15.1+dfsg-0.1","2.15.1+dfsg-0.2","2.15.1+dfsg-0.3","2.15.1+dfsg-0.4","2.15.1+dfsg-0.5","2.15.1+dfsg-1","2.15.1+dfsg-2","2.15.2+dfsg-0.1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-74860.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}