What is CVE-2026-53837?

CVE-2026-53837 is a low-severity vulnerability in Openclaw, classified under CWE-636. CVSS score: 3.7/10. Published 2026-06-12.

How severe is CVE-2026-53837?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Openclaw

CVE-2026-53837

OpenClaw before 2026.5.6 contains an improper access control vulnerability in Mattermost event handlers that fails to validate channel type metadata. Attackers can bypass intended DM policy decisions by sending crafted Mattermost events mi…

EPSS: 0.002 (8.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Openclaw — versions 0, 2026.5.6

Weakness classification (CWE)

CWE-636

References

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

Frequently asked questions

What is CVE-2026-53837?: CVE-2026-53837 is a low-severity vulnerability in Openclaw, classified under CWE-636. CVSS score: 3.7/10. Published 2026-06-12.
How severe is CVE-2026-53837?: Low severity. CVSS v3 base score is 3.7 out of 10.