What is CVE-2026-53851?

CVE-2026-53851 is a medium-severity vulnerability in Openclaw, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-06-16.

How severe is CVE-2026-53851?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Openclaw

CVE-2026-53851

OpenClaw before 2026.5.12 contains a notification bypass vulnerability allowing Slack reaction events to enter the agent pipeline despite disabled reaction notifications. Attackers can trigger unintended agent processing by sending reactio…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Openclaw — versions 0, 2026.5.12

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-53851?: CVE-2026-53851 is a medium-severity vulnerability in Openclaw, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-06-16.
How severe is CVE-2026-53851?: Medium severity. CVSS v3 base score is 5.3 out of 10.