PT-2026-23561 · Openclaw · Openclaw

Peyton Kennedy · Published 2026-02-18 · Updated 2026-03-11 · CVE-2026-29606

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions OpenClaw versions prior to 2026.2.14

Description The software contains a webhook signature-verification bypass in the voice-call extension. This allows unauthenticated requests when the tunnel.allowNgrokFreeTierLoopbackBypass option is 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. The issue is limited to configurations where the voice-call extension is enabled and the tunnel.allowNgrokFreeTierLoopbackBypass option is explicitly enabled, making the webhook reachable.

Recommendations Update to version 2026.2.14 or later.

Fix

Missing Authentication

Weakness Enumeration

CWE-306

Related Identifiers

CVE-2026-29606

GHSA-C37P-4QQG-3P76

Affected Products

Openclaw

References · 11

• https://github.com/openclaw/openclaw/security/advisories/GHSA-c37p-4qqg-3p76 · Vendor Advisory
• https://github.com/openclaw/openclaw/commit/ff11d8793b90c52f8d84dae3fbb99307da51b5c9 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-29606 · Security Note
• https://osv.dev/vulnerability/GHSA-c37p-4qqg-3p76 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-29606 · Vendor Advisory
• https://github.com/openclaw/openclaw · Note
• https://github.com/openclaw/openclaw/releases/tag/v2026.2.14 · Note
• https://vulncheck.com/advisories/openclaw-webhook-signature-verification-bypass-via-ngrok-loopback-compatibility · Note
• https://twitter.com/CveFindCom/status/2029689431028871291 · Twitter Post
• https://t.me/cveNotify/155020 · Telegram Post
• https://t.me/CVEtracker/46505 · Telegram Post