CVE-2026-53839 MEDIUM

CVE-2026-53839: OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation

Vendor Openclaw
Product OpenClaw
Weakness CWE-1023
Published June 12, 2026
Last update June 15, 2026
View on NVD All CVEs

CVSS base score

6.0/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 12, 2026 CVE published
June 15, 2026 Record updated