Openclaw
CVE-2026-28476
MEDIUM
GHSA-pg2v-8xwh-qhcc
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessConfigure malicious Urbit base URL
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ExploitOpenClaw sends unvalidated HTTP requests
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ImpactAccess internal services or exfiltrate data
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V4 - API and Web Service URL allowlisting, SSRF prevention
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Credential Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | OpenClaw versions prior to 2026.2.14 with the optional Tlon Urbit extension enabled and configurable base URL parameter accessible to attacker without authentication. |
| Impact | CVSS 8.3 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
OpenClaw versions before 2026.2.14 fail to validate base URLs in the Tlon Urbit extension, allowing attackers to trigger server-side request forgery attacks that direct the gateway to arbitrary hosts, including internal systems. This network-accessible vulnerability requires no authentication and can result in information disclosure and service disruption. No patch is currently available.
Earlier versions of this analysis (1)
OpenClaw versions prior to 2026.2.14 contain a server-side request forgery vulnerability in the optional Tlon Urbit extension that accepts user-provided base URLs for authentication without proper validation. [CVSS 8.3 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in npm
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-918 (Server-Side Request Forgery (SSRF)). Affects OpenClaw. OpenClaw versions prior to 2026.2.14 contain a server-side request forgery vulnerability in the optional Tlon Urbit extension that accepts user-provided base URLs for authentication without proper validation. Attackers who can influence the configured Urbit URL can induce the gateway to make HTTP requests to arbitrary hosts including internal addresses.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
4DescriptionCVE.org
OpenClaw versions prior to 2026.2.14 contain a server-side request forgery vulnerability in the optional Tlon Urbit extension that accepts user-provided base URLs for authentication without proper validation. Attackers who can influence the configured Urbit URL can induce the gateway to make HTTP requests to arbitrary hosts including internal addresses.
Executive ViewAI
OpenClaw versions before 2026.2.14 contain a server-side request forgery vulnerability in the Tlon Urbit authentication extension that could allow attackers to abuse your infrastructure to access internal systems or launch attacks against external targets. This affects organizations using OpenClaw with the optional Urbit extension enabled, potentially exposing internal network resources and damaging your security posture.
Disable the optional Tlon Urbit extension if not required for business operations. Implement network segmentation to restrict OpenClaw's outbound connectivity to whitelisted destinations only. Deploy Web Application Firewall (WAF) rules to validate and restrict base URL parameters in authentication requests. Monitor and log all outbound connections from OpenClaw instances. Restrict OpenClaw access to authenticated users only. No vendor patch is currently available; monitor CVE-2026-28476 and OpenClaw release notes for patch availability.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.
Affected Products (CPE)CVE.org
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