Security Advisory

CVE-2026-29079

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-13 17:19:46

Last updated 2026-03-16 17:05:28

Assigner GitHub_M

State PUBLISHED

Description

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.

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