CVE-2026-29606

medium

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.

References

Advisories
More

https://www.vulncheck.com/advisories/openclaw-webhook-signature-verification-bypass-via-ngrok-loopback-compatibility

https://github.com/openclaw/openclaw/security/advisories/GHSA-c37p-4qqg-3p76

https://github.com/openclaw/openclaw/commit/ff11d8793b90c52f8d84dae3fbb99307da51b5c9

Details

Source: Mitre, NVD

Published: 2026-03-05

Updated: 2026-03-11

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Severity: Medium

CVSS v4

Base Score: 6.3

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

Severity: Medium

EPSS

EPSS: 0.00036