Resource exhaustion in Openclaw
CVE-2026-100572
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (28.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- GitHub Security Advisory (GHSA-fw6q-2frm-jxxr) (vendor-advisory)
- VulnCheck Advisory: OpenClaw before 2026.8.1 Denial of Service via Rate Limit (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100572?
- CVE-2026-100572 is a medium-severity vulnerability in Openclaw, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-09-26.
- How severe is CVE-2026-100572?
- Medium severity. CVSS v3 base score is 5.3 out of 10.