Infinite Loop Vulnerability in FreeRDP by FreeRDP
CVE-2026-121959

7.1HIGH

Key Information:

Vendor

Freerdp

Status
Freerdp
Vendor
CVE Published:
4 November 2026

What is CVE-2026-121959?

FreeRDP before version 3.32.2 contains a vulnerability in the websocket_context_read function that leads to an infinite loop. This occurs when a malicious Remote Desktop Gateway sends a truncated WebSocket frame followed by a TLS close_notify signal, causing the client thread to enter a cycle of high CPU consumption until it is forcibly terminated.

Affected Version(s)

FreeRDP 0 < 3.32.2

FreeRDP 3.32.2

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32....
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kushalkhemka
mayank-jangid-moon
opensec-intelligence
.