Description
The BlueBubbles webhook handler in OpenClaw versions prior to 2026.2.21 contains a passwordless fallback authentication path that allows unauthenticated webhook events in certain reverse-proxy or local routing configurations. Attackers can bypass webhook authentication by exploiting the loopback/proxy heuristics to send unauthenticated webhook events to the BlueBubbles plugin.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.2.21 | 2026.2.21 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | openclaw | < 2026.2.21 | 2026.2.21 | GHSA-5mx2-2mgw-x8rm |
Advisories 1
- WID-SEC-2026-0472 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 12, 2026
References
- GitHub Security Advisory (GHSA-5mx2-2mgw-x8rm) vendor-advisory
- Patch Commit #1 patch
- Patch Commit #2 patch
- VulnCheck Advisory: OpenClaw < 2026.2.21 - Unauthenticated Webhook Access via Passwordless Fallback in BlueBubbles Plugin third-party-advisory