TI-2026-33089 Aliases CVE-2026-45289

CloudburstMC Protocol: Partially missing validation for FULL type authentication tokens

LOW 29CWE-287Published 2026-06-02 · Updated 2026-06-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0014 3rd percentileScored 2026-11-07

Fix Fixed Protocol (CloudburstMC): 3.0.0.Beta12-20260420.182526-15

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
CloudburstMC	Protocol	before 3.0.0.Beta12-20260420.182526-15	3.0.0.Beta12-20260420.182526-15	Patch available	CNA

Protocol VendorCloudburstMC Affected before 3.0.0.Beta12-20260420.182526-15 Fixed in 3.0.0.Beta12-20260420.182526-15 Patch available CNA

Remediation

Fix · CNA Protocol (CloudburstMC) Fixed in 3.0.0.Beta12-20260420.182526-15

Timeline

2026-10-02 Threatist record created from CVE-2026-45289

References

Other 1

https://github.com/CloudburstMC/Protocol/security/advisories/GHSA-g2fr-c75x-4hf9

TI-2024-19995 Cloudburst Network DoS in RakNet connection handling CVSS 3.1HIGH 8.6
TI-2026-33090 Cloudburst Network has DoS in RakNet connection handling due to missing bound checks CVSS 3.1HIGH 7.5
TI-2026-33091 Cloudburst Network erroneously handles invalid connections CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences