# CVE-2026-86138

## Summary

- **CVE ID:** CVE-2026-86138
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L)
- **CWE:** CWE-190
- **Published:** Sep 5, 2026
- **Last Modified:** Sep 8, 2026

## Description

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

## Affected Products

- xmlsoft — libxml2 (0)

## References

- [CNA](https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4)
- [CNA](https://github.com/GNOME/libxml2/commit/a4cba4b5b5a8c42e155ed42d2d2a44955465a2e4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.12%
- **EPSS Percentile:** 2.0

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._