Staging Environment: Content and features may be unstable or change without notice.
Advisory details: gitlab / npm/openclaw/CVE-2026-53859
Advisory ID gitlab/npm/openclaw/CVE-2026-53859
Aliases CVE-2026-53859
GHSA-gxg4-2rrr-jhc7
Summary OpenClaw: Hostname checks could treat trailing-dot hosts inconsistently Hostname checks could treat trailing-dot hosts inconsistently. In affected versions, a request path that accepts model- or workspace-derived URLs could present the same hostname with a trailing dot and avoid a blocklist comparison. This advisory is scoped to the named feature and configuration. It does not change OpenClaw's trusted-operator model: authenticated Gateway operators, installed plugins, and intentional local execution surfaces remain trusted unless a separate policy, approval, allowlist, sandbox, or auth boundary is crossed.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (4)
CWE-20 Improper Input Validation
CWE-918 Server-Side Request Forgery (SSRF)
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/openclaw/CVE-2026-53859.yml
Reference id Reference type URL
CVE-2026-53859 https://nvd.nist.gov/vuln/detail/CVE-2026-53859
GHSA-gxg4-2rrr-jhc7 https://github.com/advisories/GHSA-gxg4-2rrr-jhc7
GHSA-gxg4-2rrr-jhc7 Advisory https://github.com/openclaw/openclaw/security/advisories/GHSA-gxg4-2rrr-jhc7
openclaw-hostname-validation-bypass-via-trailing-dot-inconsistency Advisory https://www.vulncheck.com/advisories/openclaw-hostname-validation-bypass-via-trailing-dot-inconsistency
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/openclaw/CVE-2026-53859.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-06-16T18:38:50Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/53xxx/CVE-2026-53859.json

Source Advisory: vulnrichment/CVE-2026-53859

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]