CVE-2026-45289 MEDIUM

CVE-2026-45289: CloudburstMC Protocol: Partially missing validation for FULL type authentication tokens

Vendor Cloudburstmc
Product Protocol
Weakness CWE-287 · Improper authentication
Published June 2, 2026
Last update June 3, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

CloudburstMC Protocol is a protocol library for Minecraft Bedrock Edition. Prior to version 3.0.0.Beta12-20260420.182526-15, CloudburstMC Protocol is partially missing validation for FULL type authentication tokens (Cloudburst/Protocol). This vulnerability impacts publicly accessible software depending on the affected versions of Protocol, specifically the EncryptionUtils methods to validate auth payloads for FULL type tokens. This issue has been patched in version 3.0.0.Beta12-20260420.182526-15.

Key dates

02Disclosure timeline

June 2, 2026 CVE published
June 3, 2026 Record updated