MCPHub
CVE-2025-11287
MEDIUM
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessSend crafted HTTP request to SSE endpoint
-
ExploitBypass authentication due to flaw in handleSseConnection
-
ExecutionGain unauthorized SSE stream access
-
ImpactRead or modify data, cause partial disruption
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK
2 techniques across 2 tactics: Defense Evasion, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | No special conditions - remote unauthenticated exploitation against default configurations of MCPHub. |
| Impact | CVSS 4.0 base metrics (AV:N/AC:L/AT:N/PR:N/UI:N) signal low attack complexity with no privileges or user interaction, granting low-level impacts on confidentiality, integrity, and availability. However, EPSS predicts a 0.20% probability of exploitation in the wild (42nd percentile), which is low and suggests the vulnerability is not currently being mass-exploited. The availability of a public proof-of-concept on GitHub raises short-term risk for unpatched instances but does not indicate active campaigns. No KEV inclusion confirms absence of confirmed active exploitation. |
| Exploit ScenarioDerived | A remote attacker sends a specially crafted request to the SSE connection endpoint without providing valid credentials, exploiting the missing authentication check in handleSseConnection. This grants unauthorized access to the SSE data stream, potentially allowing the attacker to read or manipulate real-time data. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Jul 27, 2026
Improper authentication in MCPHub up to version 0.9.10 allows remote attackers to bypass authentication on the SSE connection handler. No active exploitation has been reported in CISA KEV, but public exploit code is available. EPSS 0.20% indicates low likelihood of widespread exploitation despite the public PoC.
RemediationAI
No vendor-released patch exists. Mitigations include disabling the SSE endpoint if not essential, placing a reverse proxy with authentication in front of MCPHub, or blocking external access to the service via firewall rules. Note that disabling SSE will break real-time event streaming functionality, and reverse proxy authentication adds operational complexity.
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
The vulnerability resides in the handleSseConnectionfunction of src/services/sseService.ts, which manages Server-Sent Events (SSE) connections in MCPHub. CWE-287 (Improper Authentication) indicates that the function fails to properly verify caller identity before establishing an SSE stream. The affected product is identified by CPE cpe:2.3:a:mcphubx:mcphub:*:*:*:*:*:*:*:* up to version 0.9.10, confirming the vendor and version scope.
Know when Mcphub gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Network vector, no privileges or user interaction, low impacts on confidentiality, integrity, and availability.
Primary rating from Vendor (vuldb).
CVSS VectorVendor: vuldb
DescriptionCVE.org
A vulnerability was identified in samanhappy MCPHub up to 0.9.10. This vulnerability affects the function handleSseConnectionfunction of the file src/services/sseService.ts. Such manipulation leads to improper authentication. The attack may be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
VulDB
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
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)CVE.org
Improper privilege management in samanhappy MCPHub up to 1.0.32 lets any authenticated non-admin user import a configura
OS command injection in MCPHub up to version 0.9.10 allows authenticated remote attackers to execute arbitrary system co
Server-side request forgery (SSRF) in MCPHub up to version 0.9.10 allows authenticated high-privilege users to manipulat
MCPHub below version 0.11.0 allows unauthenticated attackers to bypass authentication on unprotected endpoints and perfo
Header passthrough in samanhappy MCPHub through 1.0.45 and 1.1.7 allows a non-admin server owner to configure an upstrea
Exploit-DB