---
id: "CVE-2026-111383"
kind: "vulnerability"
aliases: ["CVE-2026-111383"]
title: "Nezha: unbounded WebSocket connections let logged-in users exhaust server resources"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["monitoring", "nezha", "other", "self-hosted"]
not_affected_if: ["version-2.3.15-or-later"]
published_at: "2026-10-16T03:18:05+00:00"
first_seen_at: "2026-10-23T21:57:12+00:00"
updated_at: "2026-10-25T03:36:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111383", "first_seen_at": "2026-10-23T21:57:12+00:00"}]
---

# Nezha: unbounded WebSocket connections let logged-in users exhaust server resources

Nezha versions from 2.0.13 before 2.3.15 do not limit concurrent connections to the /api/v1/ws/transfer WebSocket endpoint. An authenticated user can open thousands of subscriptions, exhausting file descriptors, memory and goroutines and blocking agent gRPC reconnections.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the running Nezha dashboard version and confirm whether it is `2.0.13` or later but below `2.3.15`
- unknown whether the sources give a configuration check

## Fix

- Upgrade Nezha to `2.3.15` or later
- unknown whether the sources name a workaround

## Timeline

- 2026-10-23T21:57:12+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111383

## From the sources

Nezha from 2.0.13 before 2.3.15 contains a resource exhaustion vulnerability that allows authenticated users to open unbounded concurrent connections to the /api/v1/ws/transfer WebSocket endpoint. Attackers can hold thousands of subscriptions created by ServerTransferClass.Subscribe without limits, exhausting file descriptors, memory, and goroutines and blocking agent gRPC reconnections.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_