# CVE-2026-91960

## Summary

- **CVE ID:** CVE-2026-91960
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-190
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

FreeRDP versions before 3.31.0 contain an integer overflow in WinPR's Stream_EnsureRemainingCapacity function that allows remote attackers to cause denial of service. A malicious RD Gateway peer can send a WebSocket Ping frame with a crafted 64-bit extended payload length to trigger integer wraparound, resulting in a double free that crashes the FreeRDP client during connection.

## Affected Products

- FreeRDP — FreeRDP (0)
- FreeRDP — FreeRDP (3.31.0)

## References

- [CNA](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-vccg-35r5-8jrf)
- [CNA](https://www.vulncheck.com/advisories/freerdp-before-3.31.0-integer-overflow-double-free)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.44%
- **EPSS Percentile:** 37.6

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._