Description
OpenClaw before 2026.3.28 contains a webhook replay vulnerability in Plivo V3 signature verification that canonicalizes query ordering for signatures but hashes raw URLs for replay detection. Attackers can reorder query parameters to bypass replay cache detection and trigger duplicate voice-call processing with a captured valid signed webhook.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.3.28 | 2026.3.28 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | openclaw | < 2026.3.28 | 2026.3.28 | GHSA-8689-gm9g-jgr6 |
Advisories 1
- WID-SEC-2026-0930 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 28, 2026
References
- GitHub Security Advisory (GHSA-8689-gm9g-jgr6) vendor-advisory
- VulnCheck Advisory: OpenClaw < 2026.3.28 - Webhook Replay via Query Parameter Reordering in Plivo V3 third-party-advisory