CVE-2026-45291 HIGH

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

Vendor Cloudburstmc
Product Network
Weakness CWE-20 · Input validation
Published June 5, 2026
Last update June 8, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 5, 2026 CVE published
June 8, 2026 Record updated