What is CVE-2026-53818?

CVE-2026-53818 is a medium-severity vulnerability in Openclaw, classified under Missing Authorization. CVSS score: 6.6/10. Published 2026-06-11.

How severe is CVE-2026-53818?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Auth bypass in Openclaw

CVE-2026-53818

OpenClaw before 2026.4.24 contains an authorization bypass vulnerability in the MCP loopback feature that allows non-owner callers to skip owner-only tool policies and before-tool-call hooks. Attackers can invoke owner-only behavior throug…

Vulnerability class: Broken Access Control

EPSS: 0.001 (0.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.

Affected products

Openclaw — versions 2026.4.24, 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (vendor-advisory, Mitigation, patch, Vendor Advisory)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-53818?: CVE-2026-53818 is a medium-severity vulnerability in Openclaw, classified under Missing Authorization. CVSS score: 6.6/10. Published 2026-06-11.
How severe is CVE-2026-53818?: Medium severity. CVSS v3 base score is 6.6 out of 10.