OpenClaw versions2026.2.21-2 prior to 2026.2.22 and @openclaw/voice-call versions 2026.2.21 prior to 2026.2.22 accept media-stream WebSocket upgrades before stream validation, allowing unauthenticated clients to establish connections. Remote attackers can hold idle pre-authenticated sockets open to consume connection resources and degrade service availability for legitimate streams.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/openclaw/openclaw/commit/1d8968c8a821ff1a05c294a1846b3bcb6f3…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-mfg5-7q5g-f37j
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-unauthenticated-websocket-resourc…
disclosure@vulncheck.com