What is CVE-2026-53859?

CVE-2026-53859 is a medium-severity vulnerability in Openclaw, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-06-16.

How severe is CVE-2026-53859?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SSRF in Openclaw

CVE-2026-53859

OpenClaw before 2026.5.26 contains a hostname validation vulnerability allowing attackers to bypass blocklist comparisons using trailing-dot notation in model or workspace-derived URLs. Attackers can exploit inconsistent hostname checks to…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Openclaw — versions 0, 2026.5.26

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)
CWE-1023

References

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

Frequently asked questions

What is CVE-2026-53859?: CVE-2026-53859 is a medium-severity vulnerability in Openclaw, classified under Server-Side Request Forgery (SSRF). CVSS score: 6.5/10. Published 2026-06-16.
How severe is CVE-2026-53859?: Medium severity. CVSS v3 base score is 6.5 out of 10.