# CVE-2026-86140

## Summary

- **CVE ID:** CVE-2026-86140
- **Severity:** HIGH
- **CVSS Score:** 8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L)
- **CWE:** CWE-121
- **Published:** Sep 5, 2026
- **Last Modified:** Sep 8, 2026

## Description

In libxml2 before 2.15.4, xmlSnprintfElements in valid.c has a strcat stack-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/d1686f91dbda141a752200419d35639fd6b38340)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.14%
- **EPSS Percentile:** 3.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._