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@anephenix/hub: Unauthenticated WebSocket RPC Waiter Resource Exhaustion

0
High
Published: 07/24/2026 (07/24/2026, 21:47:29 UTC)
Source: GCVE Database
Product: @anephenix/hub

Description

@anephenix/hub before version 0.2.16 contains an unauthenticated denial-of-service vulnerability. The server starts a polling loop via setInterval for every incoming WebSocket connection to request a client ID via RPC. If the client never responds, these intervals and pending requests are never cleaned up, even after the socket closes. An attacker can open many WebSocket connections and ignore server RPC messages, causing unbounded accumulation of timers and heap objects. This leads to CPU and memory exhaustion, resulting in denial of service.

CVSS v3.1

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

npmghsa
@anephenix/hub
Affected versions
<0.2.16

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/25/2026, 23:52:27 UTC

Technical Analysis

@anephenix/hub versions prior to 0.2.16 implement an RPC mechanism over WebSocket connections that requests a client ID by sending a 'get-client-id' action. For each connection, a setInterval timer polls for a matching RPC response every 10 ms. If the client never replies, the timer and the pending request remain indefinitely because there is no timeout or cleanup on socket close. This allows an unauthenticated attacker to open many connections and cause unbounded resource consumption (timers and heap objects), leading to CPU and memory exhaustion and denial of service.

Potential Impact

An unauthenticated attacker can cause a denial-of-service condition by opening many WebSocket connections and ignoring the server's RPC requests. This causes the server to accumulate timers and memory objects indefinitely, exhausting CPU and memory resources. The vulnerability affects any network-reachable @anephenix/hub server running default configuration prior to version 0.2.16.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, mitigate by limiting the number of concurrent WebSocket connections or implementing external rate limiting and connection timeouts to prevent resource exhaustion. Monitor for updates from the vendor regarding an official patch.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
GHSA-g5vv-q72c-7j78
Osv Schema Version
1.4.0
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
HIGH
Cvss Version
3.1

Threat ID: 6a6542219c2644c7f80884d5

Added to database: 07/25/2026, 23:09:21 UTC

Last enriched: 07/25/2026, 23:52:27 UTC

Last updated: 07/26/2026, 03:58:23 UTC

Views: 5

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