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CVE-2026-111383— Nezha 2.0.13 before 2.3.15 Denial of Service via /api/v1/ws/transfer WebSocket

Quick assessment

Affected
nezhahq nezha
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

哪吒（Nezha）从版本2.0.13到2.3.15（不含2.3.15）存在一个资源耗尽漏洞，该漏洞允许经过身份验证的用户向 WebSocket 端点打开无限制的并发连接。攻击者可以无限创建由 生成的数千个订阅，从而耗尽文件描述符、内存和 goroutine，并阻塞代理的 gRPC 重新连接。

CVSS 6.5 · Medium EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1499.001 · OS Exhaustion Flood

Affected Version Matrix 2

VendorProduct Version RangeStatus
nezhahq nezha 2.0.13< 2.3.15 affected
2.3.15 unaffected
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I. Basic Information for CVE-2026-111383

Vulnerability Information
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Vulnerability Title
Nezha 2.0.13 before 2.3.15 Denial of Service via /api/v1/ws/transfer WebSocket
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
nezhahq nezha 2.0.13 ~ 2.3.15 -

II. Public POCs for CVE-2026-111383

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III. Intelligence Information for CVE-2026-111383

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Vendor Advisories for CVE-2026-111383 (1)

Vendor Pages for CVE-2026-111383 (1)

Same Patch Batch · nezhahq · 2026-10-16 · 5 CVEs total

CVE-2026-111387 6.5 MEDIUM Nezha 2.2.5 before 2.3.15 Information Disclosure via DDNS List Endpoint
CVE-2026-111384 6.5 MEDIUM Nezha 1.0.0 before 2.3.15 Memory Exhaustion via File Manager WebSocket
CVE-2026-111385 4.8 MEDIUM Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools
CVE-2026-111386 4.3 MEDIUM Nezha 1.7.0 before 2.3.15 Cross-Tenant Server-ID Enumeration via getServerConfig

IV. Related Vulnerabilities

Same product: nezha
Same vendor: nezhahq
Same weakness: CWE-770

V. Comments for CVE-2026-111383

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