CVE-2026-29079
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.
- Score
- CVSS 4.0 8.2 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-03-13
- Last modified
- 2026-03-16
- Weaknesses
- CWE-843
Affected products
References
- https://github.com/lexbor/lexbor/security/advisories/GHSA-mrpr-v36q-2vp8
