CVE-2026-29606

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

State: Published
Severity: 6.3 Medium
Published: Mar 5, 2026
Updated: Mar 9, 2026
Reserved: Mar 4, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	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	VulnCheck
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L	VulnCheck

Weaknesses

CWE-306 Missing Authentication for Critical Function

Affected Products

Product	Versions
OpenClawOpenClaw	before 2026.2.14Affected

References

GitHub Security Advisory (GHSA-c37p-4qqg-3p76)vendor-advisory
Patch Commitpatch
VulnCheck Advisory: OpenClaw < 2026.2.14 - Webhook Signature Verification Bypass via ngrok Loopback Compatibilitythird-party-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.