CVE-2026-53859CWE-1023CWE-918

OpenClaw < 2026.5.26 - Hostname Validation Bypass via Trailing-Dot Inconsistency

Medium · published June 16, 2026

CVSS v4.0
6.0
EPSS
0%
Percentile
28.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.0 · MEDIUM
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
EPSS
0.00361 · 28.7th percentile
Weaknesses
CWE-1023 · Incomplete Comparison with Missing Factors; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-06-16T18:05Z
EPSS history
Timeline
  • 16 JUN 18:05Z
    OpenClaw < 2026.5.26 - Hostname Validation Bypass via Trailing-Dot Inconsistency
    cvelistv5