7.1 High

CVE-2026-121959 FreeRDP before 3.32.2 Infinite Loop via Truncated WebSocket Frame

Description

FreeRDP before 3.32.2 contains an infinite loop vulnerability in websocket_context_read that fails to handle a zero BIO result with payload outstanding. A malicious RD Gateway can send a truncated WebSocket frame followed by a TLS close_notify, causing a client thread to spin and consume CPU until killed.

CVSS 4.0 detail

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

Exploitable remotely over the network, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: None
Interaction: Passive
Confidentiality: None
Integrity: None
Availability: High
Confidentiality of other systems: None
Integrity of other systems: None
Availability of other systems: None

Affected products and versions

Product	Affected versions	Fixed in
FreeRDP 3.32	earliest → < 3.32.2	3.32.2

References

GitHub Security Advisory (GHSA-x26g-fp9v-c2pg) github.com
VulnCheck Advisory: FreeRDP before 3.32.2 Infinite Loop via Truncated WebSocket Frame www.vulncheck.com

Timeline

Published November 4, 2026
Last modified November 4, 2026

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