---
id: CVE-2026-111383
title: >-
  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
summary: >-
  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
  subscrip…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
vendor: nezhahq
product: nezha
affected:
  - nezha >= 2.0.13 < 2.3.15
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:17:33.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-111383'
references:
  - url: >-
      https://github.com/nezhahq/nezha/commit/36b742a7e9a81ed782363dd19efd77b7030fbd0f
    label: disclosure@vulncheck.com
  - url: 'https://github.com/nezhahq/nezha/security/advisories/GHSA-ch6h-w872-77mx'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/nezha-2.0.13-before-2.3.15-denial-of-service-via-api-v1-ws-transfer-websocket
    label: disclosure@vulncheck.com
  - url: 'https://github.com/nezhahq/nezha/security/advisories/GHSA-ch6h-w872-77mx'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00358
epssPercentile: 0.29385
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T16:23:58.349675Z'
ingestedAt: '2026-10-16T01:55:57.991Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.