CVE-2026-100572 OpenClaw before 2026.8.1 Denial of Service via Rate Limit
An unauthenticated attacker can exhaust rate limits in OpenClaw behind a reverse proxy, causing denial of service for legitimate Synology Chat webhooks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-100572?
CVE-2026-100572 is a medium-severity denial of service vulnerability in OpenClaw, published on 26 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenClaw versions >= 2026.3.25 and < 2026.8.1 apply invalid-token rate limiting for Synology Chat webhooks before authentication and key the limit on the raw proxy socket address. In deployments where OpenClaw sits behind a trusted reverse proxy or tunnel and multiple external clients share a single socket address, an unauthenticated sender can exhaust the shared invalid-token budget, causing subsequent legitimate Synology Chat webhook callbacks to be rejected until the rate-limit window expires. The attacker cannot obtain a valid token or read message data; the impact is temporary loss of channel availability. Fixed in 2026.8.1.
Weakness: CWE-400
Which versions are affected by CVE-2026-100572?
How do I fix CVE-2026-100572?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-100572 being exploited?
There is no known exploitation of CVE-2026-100572 in the wild and no public exploit code.
Sources
Also known as GHSA-fw6q-2frm-jxxr, GHSA-gcvj-pm5f-x5cv, MINI-ch75-55j6-6586.