Description
OpenClaw before 2026.3.25 parses JSON request bodies before validating webhook signatures, allowing unauthenticated attackers to force resource-intensive parsing operations. Remote attackers can send malicious webhook requests to trigger denial of service by exhausting server resources through forced JSON parsing before signature rejection.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.3.25 | 2026.3.25 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | openclaw | < 2026.3.28 | 2026.3.28 | GHSA-3h52-cx59-c456 |
Advisories 1
- WID-SEC-2026-0884 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 12, 2026
References
- GitHub Security Advisory (GHSA-3h52-cx59-c456) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: OpenClaw < 2026.3.25 - Denial of Service via Unauthenticated Webhook Request Parsing third-party-advisory