CVE-2026-67292: FreeRDP before 3.29.0 WebSocket Ping Buffer Over-disclosure
FreeRDP before 3.29.0 contains a buffer over-disclosure vulnerability in the gateway WebSocket transport (libfreerdp/core/gateway/websocket.c). The client's Pong reply reuses a fixed 1024-byte response stream whose length is not sealed to the actual received Ping payload, so a malicious gateway/WebSocket peer sending a non-empty Ping control frame causes the client to reply with an overlong Pong that discloses bytes beyond the received payload (the peer receives the masking key and can unmask the reply). A zero-length Ping reaches an assertion and terminates the client (denial of service).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
FreeRDP gateway WebSocket transport (libfreerdp/core/gateway/websocket.c)to a version that resolves this vulnerability.Fixed in 3.29.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-67292?
The severity of CVE-2026-67292 is medium with a CVSS score of 6.5.
How do I fix CVE-2026-67292?
To fix CVE-2026-67292, update FreeRDP to version 3.29.0 or later.
What type of vulnerability is CVE-2026-67292?
CVE-2026-67292 is a buffer over-disclosure vulnerability affecting the WebSocket transport in FreeRDP.
What are the potential impacts of CVE-2026-67292?
CVE-2026-67292 could allow a malicious gateway to disclose sensitive information through the WebSocket communication.
In which software is CVE-2026-67292 found?
CVE-2026-67292 is found in FreeRDP versions prior to 3.29.0.