What is CVE-2026-29606?

CVE-2026-29606 is a medium-severity vulnerability in Openclaw, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-03-05.

How severe is CVE-2026-29606?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Openclaw

CVE-2026-29606

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.

Vulnerability class: Broken Authentication

EPSS: 0.003 (21.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

Affected products

Openclaw — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

disclosure@vulncheck.com (vendor-advisory, Vendor Advisory)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-29606?: CVE-2026-29606 is a medium-severity vulnerability in Openclaw, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-03-05.
How severe is CVE-2026-29606?: Medium severity. CVSS v3 base score is 6.5 out of 10.