CVE-2026-29606 | THREATINT

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.

PUBLISHED Reserved 2026-03-04 | Published 2026-03-05 | Updated 2026-03-06 | Assigner VulnCheck

MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Problem types

Missing Authentication for Critical Function

Product status

Default status

unaffected

Any version before 2026.2.14

affected

Credits

Peyton Kennedy (p80n-sec) reporter

References

github.com/...enclaw/security/advisories/GHSA-c37p-4qqg-3p76 (GitHub Security Advisory (GHSA-c37p-4qqg-3p76)) vendor-advisory

github.com/...ommit/ff11d8793b90c52f8d84dae3fbb99307da51b5c9 (Patch Commit) patch

www.vulncheck.com/...bypass-via-ngrok-loopback-compatibility (VulnCheck Advisory: OpenClaw < 2026.2.14 - Webhook Signature Verification Bypass via ngrok Loopback Compatibility) third-party-advisory

cve.org (CVE-2026-29606)

nvd.nist.gov (CVE-2026-29606)

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