Threat intelligence dashboard
CVE-2026-100558high

OpenClaw before 2026.8.1 Resource Exhaustion via WebSocket Upgrade

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.

Risk score

8.7

CVSS 4.0

Vendor
OpenClaw
Product
OpenClaw
CWE
CWE-400
Published
Sep 26, 2026
Updated
Sep 28, 2026
CISA KEV
Not flagged

Affected products and versions

OpenClaw

OpenClaw

Version / rangeStatusType
0 to before 2026.8.1affectedsemver
2026.8.1unaffectedsemver

Technical metrics

8.7

CVSS 4.0

Severity
high
Source
VulnCheck
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

7.5

CVSS 3.1

Severity
high
Source
VulnCheck
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H