Description
OpenClaw before 2026.3.13 reads and buffers Telegram webhook request bodies before validating the x-telegram-bot-api-secret-token header, allowing unauthenticated attackers to exhaust server resources. Attackers can send POST requests to the webhook endpoint to force memory consumption, socket time, and JSON parsing work before authentication validation occurs.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenClaw | OpenClaw | < 2026.3.13 | 2026.3.13 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | openclaw | < 2026.3.13 | 2026.3.13 | GHSA-jq3f-vjww-8rq7 |
Advisories 1
- WID-SEC-2026-0727 OpenClaw: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 31, 2026
References
- GitHub Security Advisory (GHSA-jq3f-vjww-8rq7) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: OpenClaw < 2026.3.13 - Resource Exhaustion via Unauthenticated Telegram Webhook Request third-party-advisory