CVE-2026-111383: Allocation of Resources Without Limits or Throttling in nezhahq nezha
Description
Nezha versions from 2.0.13 up to but not including 2.3.15 have a resource exhaustion vulnerability. Authenticated users can open unlimited concurrent WebSocket connections to the /api/v1/ws/transfer endpoint, causing exhaustion of file descriptors, memory, and goroutines. This can block agent gRPC reconnections and degrade service availability.
CVSS v4.0
Score 7.1high
Affected software
nezhahq
nezha
pkg:golang/github.com/nezhahq/nezhaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-111383 describes a resource exhaustion vulnerability in Nezha versions >=2.0.13 and <2.3.15. Authenticated attackers can create unbounded concurrent connections to the /api/v1/ws/transfer WebSocket endpoint, holding thousands of subscriptions via ServerTransferClass.Subscribe without limits. This leads to exhaustion of system resources such as file descriptors, memory, and goroutines, ultimately blocking agent gRPC reconnections and potentially impacting service stability.
Potential Impact
The vulnerability allows authenticated users to exhaust critical system resources by opening unlimited concurrent WebSocket connections. This can cause denial of service conditions by blocking agent gRPC reconnections and degrading the availability and reliability of the Nezha service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user access to the /api/v1/ws/transfer endpoint or implement external rate limiting to prevent unbounded concurrent connections.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-15T21:55:44.537Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad17f0b2cdf04f656a4cf5b
Added to database: 10/16/2026, 01:34:03 UTC
Last enriched: 10/16/2026, 01:48:28 UTC
Last updated: 10/16/2026, 01:49:09 UTC
Views: 7
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