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CVE-2026-67292

FreeRDP before 3.29.0 WebSocket Ping Buffer Over-disclosure

Published: Aug 1, 2026Updated: Aug 3, 2026 Sources: CVE List NVDCWE-130
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 82.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

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).

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-130

Affected Products

FreeRDP
oss-project·US
FreeRDP
OSS Libraries

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f
github.com
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8v6m-2cmc-chx9
github.com
https://www.vulncheck.com/advisories/freerdp-before-websocket-ping-buffer-over-disclosure
vulncheck.com

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