What is CVE-2026-53838?

CVE-2026-53838 is a critical-severity vulnerability in Openclaw, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 9.8/10. Published 2026-06-12.

How severe is CVE-2026-53838?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Openclaw

CVE-2026-53838

OpenClaw before 2026.5.27 contains a state mutation vulnerability in node pairing reconnection that allows paired nodes to confuse approval scope decisions. Attackers can exploit reconnection logic to restore or present broader node author…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.002 (13.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Openclaw — versions 0, 2026.5.27

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

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

Frequently asked questions

What is CVE-2026-53838?: CVE-2026-53838 is a critical-severity vulnerability in Openclaw, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 9.8/10. Published 2026-06-12.
How severe is CVE-2026-53838?: Critical severity. CVSS v3 base score is 9.8 out of 10.