CVE-2026-53839

Medium

Description

OpenClaw before 2026.5.7 contains a hostname validation vulnerability in retry endpoint checks that allows matching hostname prefixes instead of exact hostnames. Attackers can exploit this by crafting a hostname prefix resembling a trusted host to send authentication material to untrusted endpoints.

SeverityMedium

CVSS6.5

Exploit probability—

ProductOpenclaw

PublishedJun 12, 2026

First seenJun 12, 2026

Weakness typeCWE-1023CWE-1023

How to fix

Update

openclaw openclaw2026.5.7 or later
openclaw2026.5.7 or later

Vendor advisories

github.com/openclaw/openclaw/security/advisories/GHSA-77q5-rr5v-x43q

Affected products

Product	Affected versions	Fixed in
openclaw openclaw	v < 2026.5.7	2026.5.7
openclawnpm	v < 2026.5.7	2026.5.7

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