Vulnerability
CVE-2026-100558
Descriptive record received from OpenCTI and minimised for consultation in the Intel portal.
- Sharing
- PUBLIC-OSINT
- Confidence
- 100
- Source
- The CVE Program
- Updated
- 26/09/2026 08:15
Description
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.
Aliases and classifications
CWE-400Uncontrolled Resource Consumption
Minimised technical details
No raw data- cisa kev
- False
- cvss score
- 7.5
- cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- cvss severity
- HIGH
Provenance
Public references
- VulnCheck Advisory: OpenClaw before 2026.8.1 Resource Exhaustion via WebSocket Upgrade
https://www.vulncheck.com/advisories/openclaw-before-2026.8.1-resource-exhaustion-via-websocket-upgrade - GitHub Security Advisory (GHSA-4r25-35qc-fr6j)
https://github.com/openclaw/openclaw/security/advisories/GHSA-4r25-35qc-fr6j
EudorIA correlation
Intel catalogue
The vulnerability is also available in the EudorIA editorial catalogue.
Open EudorIA analysisPresence in OpenCTI describes an intelligence correlation and does not, by itself, constitute evidence of compromise, legal attribution or operational guidance applicable without context verification.