CVE-2026-45289CWE-287

CloudburstMC Protocol: Partially missing validation for FULL type authentication tokens

Medium · published June 2, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
12.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00228 · 12.8th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-06-02T20:36Z
EPSS history
Timeline
  • 02 JUN 20:36Z
    CloudburstMC Protocol: Partially missing validation for FULL type authentication tokens
    cvelistv5