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CVE-2026-53859

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

Published: Jun 16, 2026Updated: Jun 17, 2026 Sources: CVE List NVDCWE-918
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.2%
Top 88.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-918CWE-1023

Affected Products

OpenClawOpenClaw
Library
OSS Libraries / npm
openclawopenclaw
Library
OSS Libraries / npm
openclawoss-projectSecurity Productsaka crabbox, clawdbot

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/openclaw/openclaw/security/advisories/GHSA-gxg4-2rrr-jhc7
github.com
https://www.vulncheck.com/advisories/openclaw-hostname-validation-bypass-via-trailing-dot-inconsistency
vulncheck.com

Timeline

Published
Jun 16, 2026
Last Updated
Jun 17, 2026

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