CVE-2026-29606
6.3
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
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OpenClaw | OpenClaw | 0 < 2026.2.14 | affected |
Weaknesses
- CWE-306: Missing Authentication for Critical Function
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-c37p-4qqg-3p76
- https://github.com/openclaw/openclaw/commit/ff11d8793b90c52f8d84dae3fbb99307da51b5c9
- https://www.vulncheck.com/advisories/openclaw-webhook-signature-verification-bypass-via-ngrok-loopback-compatibility
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