CVE-2026-111383 Details
Description
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.
A resource exhaustion vulnerability has been identified in Nezha versions 2.0.13 prior to 2.3.15. This vulnerability allows authenticated users to open an unlimited number of concurrent connections to the WebSocket endpoint /api/v1/ws/transfer. Each connection is managed by the ServerTransferClass.Subscribe method, which does not impose any limits on the number of subscriptions. As a result, attackers can create thousands of subscriptions, leading to the exhaustion of file descriptors, memory, and goroutines. This resource depletion blocks gRPC reconnections for the agent, causing a significant disruption.
Users can update to Nezha version 2.3.15 or later, where this vulnerability has been fixed. Instructions for updating can be found in the Nezha GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 16, 2026CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/nezhahq/nezha/security/advisories/GHSA-ch6h-w872-77mx | CISA-ADP | AdvisoryRemedyVendor |
| https://github.com/nezhahq/nezha/commit/36b742a7e9a81ed782363dd19efd77b7030fbd0f | [email protected] | Source CodeVendor |
| https://github.com/nezhahq/nezha/security/advisories/GHSA-ch6h-w872-77mx | [email protected] | AdvisoryRemedyVendor |
| https://www.vulncheck.com/advisories/nezha-2.0.13-before-2.3.15-denial-of-service-via-api-v1-ws-transfer-websocket | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Nezha | >= 2.0.13, < 2.3.15 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 16, 2026 | New CVE Received | [email protected] |