CVE-2026-53859

Medium

Description

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 reach destinations that operators intended to block through hostname policies.

SeverityMedium

CVSS6.5

Exploit probability—

ProductOpenclaw

PublishedJun 16, 2026

First seenJun 16, 2026

Weakness typeCWE-1023CWE-1023 CWE-918Server-side request forgery (SSRF)

How to fix

Update

openclaw openclaw2026.5.26 or later
openclaw2026.5.26 or later

Vendor advisories

github.com/openclaw/openclaw/security/advisories/GHSA-gxg4-2rrr-jhc7

Affected products

Product	Affected versions	Fixed in
openclaw openclaw	v < 2026.5.26, 2026.5.26	2026.5.26
openclawnpm	v < 2026.5.26	2026.5.26

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