CVE-2026-29606
MEDIUMOpenClaw < 2026.2.14 - Unauthenticated Webhook Signature Verification Bypass via Ngrok Loopback Compatibility
Title source: llmDescription
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.
References (3)
Core 3
Core References
Vendor Advisory vendor-advisory
https://github.com/openclaw/openclaw/security/advisories/GHSA-c37p-4qqg-3p76
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/openclaw-webhook-signature-verification-bypass-via-ngrok-loopback-compatibility
Scores
CVSS v3
6.5
EPSS
0.0029
EPSS Percentile
20.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-306
Status
published
Products (2)
npm/openclaw
0 - 2026.2.14npm
openclaw/openclaw
< 2026.2.14
Published
Mar 05, 2026
Tracked Since
Mar 06, 2026