Vulnerabilities CVE-2026-53839

CVE-2026-53839

Medium

Open

TLP:CLEAR

OpenClaw < 2026.5.7 - Hostname Prefix Matching Bypass in Trusted Retry Endpoint Validation

NVD CVE.org

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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.

Details

CVSS Score: 6.0
EPSS Score ⓘ: 0.27%

18.5th percentile
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
Confidence: 90%
Published: Jun 12, 2026
Last Modified: Jul 14, 2026

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