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CVE-2026-45291— Cloudburst Network erroneously handles invalid connections

Quick assessment

Affected
CloudburstMC Network
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cloudburst Network是Cloudburst项目中使用的网络组件。 Cloudburst Network 1.0.0.CR3-20260418.124334-32之前版本存在输入验证错误漏洞，该漏洞源于网络组件问题，可能导致攻击者利用漏洞关闭父netty通道，使其无法运行。

CVSS 7.5 · High EPSS 0.46% · P38

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
CloudburstMC Network < 1.0.0.CR3-20260418.124334-32 affected
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I. Basic Information for CVE-2026-45291

Vulnerability Information
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Vulnerability Title
Cloudburst Network erroneously handles invalid connections
Source: CVE Program / CVE List V5
Vulnerability Description
Cloudburst Network provides network components used within Cloudburst projects. A vulnerability in versions prior to `1.0.0.CR3-20260418.124334-32` impacts publicly accessible software depending on the affected versions of Network and allows an attacker to exploit a bug in Network to close the parent netty channel, rendering it inoperable. All consumers of the library should upgrade to at least version `1.0.0.CR3-20260418.124334-32`. There are no known workarounds beyond updating the library.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cloudburst Network 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cloudburst Network是Cloudburst项目中使用的网络组件。 Cloudburst Network 1.0.0.CR3-20260418.124334-32之前版本存在输入验证错误漏洞，该漏洞源于网络组件问题，可能导致攻击者利用漏洞关闭父netty通道，使其无法运行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
CloudburstMC Network < 1.0.0.CR3-20260418.124334-32 -

II. Public POCs for CVE-2026-45291

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9135 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-45291

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Vendor Advisories for CVE-2026-45291 (1)

IV. Related Vulnerabilities

Same product: Network
Same vendor: CloudburstMC
Same weakness: CWE-20

V. Comments for CVE-2026-45291

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