CVE-2026-29079

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/13/2026

Last Modified3/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

lexbor:lexbor

Weaknesses (CWE)

CWE-843

References

https://github.com/lexbor/lexbor/security/advisories/GHSA-mrpr-v36q-2vp8(security-advisories@github.com)

IOC Correlations

No correlations recorded

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