Vulnerability DatabaseCVE-2026-86142
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CVE-2026-86142
Published:September 05, 2026
Updated:September 22, 2026
In libxml2 before 2.15.4, there is a heap-based buffer overflow in xmlXPtrEvalXPtrPart because of xmlXPtrEval xpointer length saturation.
Affected Packages
https://github.com/GNOME/libxml2.git (GITHUB):
Affected version(s) >=v2.14.6 <v2.15.4
Fix Suggestion:
Update to version v2.15.4
Related Resources (5)
https://github.com/GNOME/libxml2/commit/6b3a736c0edc74ceec3d82f5252499d7911b3a58
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86142.json
https://nvd.nist.gov/vuln/detail/CVE-2026-86142
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1113
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CVSS v4
Base Score:
7.5
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.9
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Weakness Type (CWE)
Heap-based Buffer Overflow
CWE-122
EPSS
Base Score:
0.15