OpenClaw's voice-call plugin versions before 2026.2.3 contain an improper authentication vulnerability in webhook verification that allows remote attackers to bypass verification by supplying untrusted forwarded headers. Attackers can spoof webhook events by manipulating Forwarded or X-Forwarded-* headers in reverse-proxy configurations that implicitly trust these headers.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://github.com/openclaw/openclaw/commit/a749db9820eb6d6224032a5a34223d286d2…
disclosure@vulncheck.com
https://github.com/openclaw/openclaw/security/advisories/GHSA-3m3q-x3gj-f79x
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/openclaw-voice-call-webhook-verification-b…
disclosure@vulncheck.com