CVE-2026-53859
MEDIUMOpenClaw < 2026.5.26 - Hostname Validation Bypass via Trailing-Dot Inconsistency
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-gxg4-2rrr-jhc7)
https://github.com/openclaw/openclaw/security/advisories/GHSA-gxg4-2rrr-jhc7
Third Party Advisory third-party-advisory
VulnCheck Advisory: OpenClaw < 2026.5.26 - Hostname Validation Bypass via Trailing-Dot Inconsistency
https://www.vulncheck.com/advisories/openclaw-hostname-validation-bypass-via-trailing-dot-inconsistency
Scores
CVSS v3
6.5
EPSS
0.0021
EPSS Percentile
11.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1023
CWE-918
Status
published
Products (5)
npm/openclaw
0 - 2026.5.26npm
openclaw/openclaw
2026.5.26 beta1 (2 CPE variants)
OpenClaw/OpenClaw
< 2026.5.26
openclaw/openclaw
< 2026.5.26
OpenClaw/OpenClaw
2026.5.26
Published
Jun 16, 2026
Tracked Since
Jun 17, 2026