CVE-2026-100558OpenClaw before 2026.8.1 Resource Exhaustion via WebSocket Upgrade
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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OpenClaw versions before 2026.8.1 contain a resource exhaustion vulnerability in the Gateway listener that allows unauthenticated clients to retain response sockets by sending WebSocket upgrade requests without matching connection semantics. Attackers can repeatedly send malformed upgrade requests to exhaust listener resources and cause denial of service without consuming the WebSocket pre-auth connection budget.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OpenClaw OpenClaw openclaw:openclaw (from the name) | before 2026.8.1; 2026.8.1 not affected | CNA record |
References
- https://github.com/openclaw/openclaw/security/advisories/GHSA-4r25-35qc-fr6jvendor-advisory
- https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-resource-exhaustion-via-websocket-upgradethird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.