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Advisories

OpenClaw < 2026.2.14 - Webhook Signature Verification Bypass via ngrok Loopback Compatibility

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severity
medium
date
Affecting

  • OpenClaw < 2026.2.14

CWE
  • CWE-306 Missing Authentication for Critical Function
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Credit
Peyton Kennedy (p80n-sec)
Description
OpenClaw versions prior to 2026.2.14 contain a webhook signature-verification bypass in the voice-call extension that allows unauthenticated requests when the tunnel.allowNgrokFreeTierLoopbackBypass option is explicitly enabled. An external attacker can send forged requests to the publicly reachable webhook endpoint without a valid X-Twilio-Signature header, resulting in unauthorized webhook event handling and potential request flooding attacks.

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