High severity7.5NVD Advisory· Published Sep 26, 2026· Updated Sep 28, 2026

CVE-2026-100558

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

OpenClaw/Openclawllm-fuzzy
Range: <2026.8.1

Patches

Vulnerability mechanics

References

github.com/openclaw/openclaw/security/advisories/GHSA-4r25-35qc-fr6jnvd
www.vulncheck.com/advisories/openclaw-before-2026.8.1-resource-exhaustion-via-websocket-upgradenvd

News mentions

No linked articles in our index yet.

cvss	0.488
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000