GitHub Advisoryadvisory · npm
GHSA-9528-x887-j2fp OpenClaw's Nextcloud Talk webhook missing rate limiting on shared secret authentication
MEDIUM
Official page ↗
- Aliases
- CVE-2026-33580
- Ecosystem
- npm
- Packages
- openclaw
- Severity
- Moderate
- Weaknesses
- CWE-307
- Reviewed
- 2026-03-31
Affected packages
• npm openclaw: < 2026.3.28 → fixed in 2026.3.28
Description
Summary
Nextcloud Talk webhook signature failures were not throttled even though the integration relies on an operator-configured shared secret that may be weak.
Impact
An attacker who could reach the webhook endpoint could brute-force weak secrets online and then forge inbound webhook events.
Affected Component
`extensions/nextcloud-talk/src/monitor.ts`
Fixed Versions
• Affected: `= 2026.3.28`
• Latest stable `2026.3.28` contains the fix.
Fix
Fixed by commit `e403decb6e` (`nextcloud-talk: throttle repeated webhook auth failures`).
OpenClaw thanks @AntAISecurityLab for reporting.
Related
Alias · CVE (1)
- CVE-2026-33580 OpenClaw before 2026.3.28 contains a missing rate limiting vulnerability in the Nextcloud Talk webhook authentication that allows attackers… vulnerability
Weakness · CWE (1)
- CWE-307 Improper Restriction of Excessive Authentication Attempts weakness
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp web
- https://nvd.nist.gov/vuln/detail/CVE-2026-33580 advisory
- https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd web
- https://github.com/openclaw/openclaw package
- https://github.com/openclaw/openclaw/releases/tag/v2026.3.28 web
- https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication web