CVE-2026-33580

MEDIUM6.5

OpenClaw < 2026.3.28 - Brute Force Attack via Missing Rate Limiting on Webhook Shared Secret Authentication

Published Mar 31, 2026

Modified 3 weeks ago

Details

OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers to brute-force weak shared secrets. Attackers who can reach the webhook endpoint can exploit this to forge inbound webhook events by repeatedly attempting authentication without throttling.

References

FIX

https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd

ADVISORY

https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-33580

ADVISORY

https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication

CVSS Analysis

CVSS v4.0

6.3