CVE-2026-29606 MEDIUM

CVE-2026-29606: OpenClaw < 2026.2.14 - Webhook Signature Verification Bypass via ngrok Loopback Compatibility

Vendor Openclaw
Product OpenClaw
Weakness CWE-306 · Missing auth
Published March 5, 2026
Last update March 9, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 5, 2026 CVE published
March 9, 2026 Record updated