Access of Resource Using Incompatible Type ('Type Confusion') Affecting lexbor package, versions <3.0.0-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.26% (18th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-LEXBOR-15665438
  • published16 Mar 2026
  • disclosed13 Mar 2026

Introduced: 13 Mar 2026

CVE-2026-29079  (opens in a new tab)
CWE-843  (opens in a new tab)

How to fix?

Upgrade Debian:unstable lexbor to version 3.0.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream lexbor package and not the lexbor package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1