CVE-2026-86138

7.8 highEPSS 0.1%

High (7.8) in xmlsoft libxml2. EPSS 0.1% chance of exploitation in the next 30 days.

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

Severity

7.8 high

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

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 2% of CVEs (scores of 2026-10-31)
CWE: CWE-190
Published: 2026-09-05
Modified: 2026-09-15
Record from: the NVD, synced 2026-10-19