FreeRDP up to 3.28.0 Gateway WebSocket Transport websocket.c information disclosure

Summaryinfo

A vulnerability labeled as problematic has been found in FreeRDP up to 3.28.0. The affected element is an unknown function of the file libfreerdp/core/gateway/websocket.c of the component Gateway WebSocket Transport. The manipulation results in information disclosure. This vulnerability was named CVE-2026-67292. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in FreeRDP up to 3.28.0. Affected is an unknown part of the file libfreerdp/core/gateway/websocket.c of the component Gateway WebSocket Transport. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

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).

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-67292 since 07/29/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 3.29.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-51811). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28.0

License

• open-source

Website

• Product: https://github.com/FreeRDP/FreeRDP/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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