Description
OpenClaw versions prior to 2026.2.13 contain a denial of service vulnerability in webhook handlers that buffer request bodies without strict byte or time limits. Remote unauthenticated attackers can send oversized JSON payloads or slow uploads to webhook endpoints causing memory pressure and availability degradation.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.2.13 | 2026.2.13 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | clawdbot | <= 2026.1.24-3 | — | GHSA-q447-rj3r-2cgh |
| npm | openclaw | < 2026.2.13 | 2026.2.13 | GHSA-q447-rj3r-2cgh |
Advisories 1
- WID-SEC-2026-0424 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 5, 2026
References
- GitHub Security Advisory (GHSA-q447-rj3r-2cgh) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: OpenClaw < 2026.2.13 - Denial of Service via Unbounded Webhook Request Body Buffering third-party-advisory