OpenClaw's Nextcloud Talk webhook missing rate limiting on shared secret authentication
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:
<= 2026.3.24 - Patched:
>= 2026.3.28 - Latest stable
2026.3.28contains the fix.
Fix
Fixed by commit e403decb6e (nextcloud-talk: throttle repeated webhook auth failures).
OpenClaw thanks @AntAISecurityLab for reporting.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | openclaw | < 2026.3.28 | 2026.3.28 |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-9528-x887-j2fp
- https://nvd.nist.gov/vuln/detail/CVE-2026-33580
- https://github.com/openclaw/openclaw/commit/e403decb6e20091b5402780a7ccd2085f98aa3cd
- https://github.com/openclaw/openclaw
- https://github.com/openclaw/openclaw/releases/tag/v2026.3.28
- https://www.vulncheck.com/advisories/openclaw-brute-force-attack-via-missing-rate-limiting-on-webhook-shared-secret-authentication
- Weakness (CWE)
CWE-307- Platform
- npm
- Package
openclaw- Disclosed
- 31.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-9528-x887-j2fp - CC BY 4.0
Vulnerability history: openclaw
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 589
- First → latest
- 02.2026 10.2026
- Without a fix
- 9
- Exploited in attacks
- 0
Severity breakdown
- Critical 20
- High 215
- Medium 300
- Low 54
Disclosures per year
- 2026: 589
-
OpenClaw's Nextcloud Talk webhook missing rate limiting on shared secret authentication this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.