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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| OpenClaw | OpenClaw | < 2026.3.13 |
References
- https://github.com/openclaw/openclaw/commit/7e49e98f79073b11134beac27fdff547ba5a4a02Patch
- https://github.com/openclaw/openclaw/security/advisories/GHSA-jq3f-vjww-8rq7Vendor Advisory
- https://www.vulncheck.com/advisories/openclaw-resource-exhaustion-via-unauthenticated-telegram-webhook-requestThird Party Advisory
Timeline
- Published
- Mar 29, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed