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

CVSS 5.3 · Medium EPSS 0.14% · P4

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
CloudburstMCProtocol< 3.0.0.Beta12-20260420.182526-15affected
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I. Basic Information for CVE-2026-45289

Vulnerability Information
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Vulnerability Title
CloudburstMC Protocol: Partially missing validation for FULL type authentication tokens
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Protocol 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Protocol是Cloudburst开源的一个支持多版本Minecraft的协议库。 Protocol 3.0.0.Beta12-20260420.182526-15之前版本存在授权问题漏洞，该漏洞源于对FULL类型认证令牌的验证缺失，可能导致受影响软件受影响。
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

VendorProductAffected VersionsCPESubscribe
CloudburstMCProtocol < 3.0.0.Beta12-20260420.182526-15 -

II. Public POCs for CVE-2026-45289

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III. Intelligence Information for CVE-2026-45289

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Vendor Advisories for CVE-2026-45289 (1)

IV. Related Vulnerabilities

Same product: Protocol
Same vendor: CloudburstMC
Same weakness: CWE-287

V. Comments for CVE-2026-45289

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