CVE-2026-86138

In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.

CVSS v3 6.9 MEDIUM

6.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.4 / Impact : 5.5

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4	Patch
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4	Release Notes

Configurations

Configuration 1 (hide)

cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-09-05 05:17

Updated : 2026-09-15 19:40

NVD link : CVE-2026-86138

Mitre link : CVE-2026-86138

CVE.ORG link : CVE-2026-86138

JSON object : View

Products Affected

xmlsoft

libxml2

CWE

CWE-190

Integer Overflow or Wraparound

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