| Component | OpenClaw |
| Severity | medium (CVSS 6.5) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| Published (NVD) | 2026-03-05 |
| Last modified | 2026-06-17 |
| Affected versions | openclaw < 2026.2.14 |
| Fixed in | 2026.2.14 |
| Weakness | CWE-306 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade OpenClaw to
2026.2.14or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-29606
- 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
Read more
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