{"id":"UBUNTU-CVE-2026-29079","details":"Lexbor is a web browser engine library. Prior to 2.7.0, a type‑confusion vulnerability exists in Lexbor’s HTML fragment parser. When ns = UNDEF, a comment is created using the “unknown element” constructor. The comment’s data are written into the element’s fields via an unsafe cast, corrupting the qualified_name field. That corrupted value is later used as a pointer and dereferenced near the zero page. This vulnerability is fixed in 2.7.0.","modified":"2026-05-20T16:24:54.501091781Z","published":"2026-03-13T19:54:00Z","upstream":["CVE-2026-29079"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-29079"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-29079"},{"type":"REPORT","url":"https://github.com/lexbor/lexbor/security/advisories/GHSA-mrpr-v36q-2vp8"}],"affected":[{"package":{"name":"lexbor","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/lexbor?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"liblexbor2","binary_version":"2.6.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-29079.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}