Description
OpenClaw versions prior to 2026.2.25 lack durable replay state for Nextcloud Talk webhook events, allowing valid signed webhook requests to be replayed without suppression. Attackers can capture and replay previously valid signed webhook requests to trigger duplicate inbound message processing and cause integrity or availability issues.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.2.25 | 2026.2.25 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | openclaw | < 2026.2.25 | 2026.2.25 | GHSA-r9q5-c7qc-p26w |
Advisories 1
- WID-SEC-2026-0542 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 12, 2026
References
- GitHub Security Advisory (GHSA-r9q5-c7qc-p26w) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: OpenClaw < 2026.2.25 - Webhook Replay Attack via Missing Durable Replay Suppression third-party-advisory