CVE-2026-86142 — MEDIUM (6.9)

Q: What is CVE-2026-86142?

CVE-2026-86142 is a vulnerability with a CVSS score of 6.9 (MEDIUM). In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.

Q: How severe is CVE-2026-86142?

CVE-2026-86142 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-86142?

Check the references section above for vendor advisories and patch information. Affected products include: Xmlsoft Libxml2.

Vulnerability Description

In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.

CVSS Score

6.9

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

LOW

Affected Products

Vendor	Product	Versions
Xmlsoft	Libxml2	< 2.15.4

Related Weaknesses (CWE)

CWE-122

References

https://github.com/GNOME/libxml2/commit/6b3a736c0edc74ceec3d82f5252499d7911b3a58Patch
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4Release Notes
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1113Vendor Advisory

FAQ

What is CVE-2026-86142?

CVE-2026-86142 is a vulnerability with a CVSS score of 6.9 (MEDIUM). In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.

How severe is CVE-2026-86142?

CVE-2026-86142 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-86142?

Check the references section above for vendor advisories and patch information. Affected products include: Xmlsoft Libxml2.