Summary
OpenClaw's Nextcloud Talk webhook missing rate limiting on shared secret authentication
Nextcloud Talk webhook signature failures were not throttled even though the integration relies on an operator-configured shared secret that may be weak.
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.
Impact
An attacker who could reach the webhook endpoint could brute-force weak secrets online and then forge inbound webhook events.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Fixed by commit e403decb6e (nextcloud-talk: throttle repeated webhook auth failures).
OpenClaw thanks @AntAISecurityLab for reporting.
Frequently Asked Questions
- What is CVE-2026-33580? CVE-2026-33580 is a medium-severity security vulnerability in openclaw (npm), affecting versions <= 2026.3.24. It is fixed in 2026.3.28.
- Which versions of openclaw are affected by CVE-2026-33580? openclaw (npm) versions <= 2026.3.24 is affected.
- Is there a fix for CVE-2026-33580? Yes. CVE-2026-33580 is fixed in 2026.3.28. Upgrade to this version or later.
- Is CVE-2026-33580 exploitable, and should I be worried? Whether CVE-2026-33580 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-33580 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-33580? Upgrade
openclawto 2026.3.28 or later.