Vulnerability DatabaseCVE-2026-86138
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CVE-2026-86138
Published:September 05, 2026
Updated:September 22, 2026
In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.
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 (4)
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4
https://nvd.nist.gov/vuln/detail/CVE-2026-86138
https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86138.json
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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)
Integer Overflow or Wraparound
CWE-190
EPSS
Base Score:
0.13