CVE-2026-45289: CWE-287: Improper Authentication in CloudburstMC Protocol
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.
AI Analysis
Technical Summary
The CloudburstMC Protocol library for Minecraft Bedrock Edition suffers from improper authentication due to partial missing validation of FULL type authentication tokens in versions before 3.0.0.Beta12-20260420.182526-15. The affected component is the EncryptionUtils methods responsible for validating authentication payloads. This flaw corresponds to CWE-287 (Improper Authentication). The issue is fixed in version 3.0.0.Beta12-20260420.182526-15.
Potential Impact
An attacker could exploit this vulnerability to bypass proper authentication checks for FULL type tokens, potentially allowing unauthorized access or actions within software relying on the affected versions of CloudburstMC Protocol. The CVSS score of 5.3 indicates a medium impact with no confidentiality or availability impact, but integrity impact is present. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade to CloudburstMC Protocol version 3.0.0.Beta12-20260420.182526-15 or later, where the authentication validation issue has been patched. No other mitigations or temporary fixes are documented. Patch status is confirmed by the vendor advisory stating the fix is included in that version.
CVE-2026-45289: CWE-287: Improper Authentication in CloudburstMC Protocol
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.
CVSS v3.1
Score 5.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The CloudburstMC Protocol library for Minecraft Bedrock Edition suffers from improper authentication due to partial missing validation of FULL type authentication tokens in versions before 3.0.0.Beta12-20260420.182526-15. The affected component is the EncryptionUtils methods responsible for validating authentication payloads. This flaw corresponds to CWE-287 (Improper Authentication). The issue is fixed in version 3.0.0.Beta12-20260420.182526-15.
Potential Impact
An attacker could exploit this vulnerability to bypass proper authentication checks for FULL type tokens, potentially allowing unauthorized access or actions within software relying on the affected versions of CloudburstMC Protocol. The CVSS score of 5.3 indicates a medium impact with no confidentiality or availability impact, but integrity impact is present. There are no known exploits in the wild at this time.
Mitigation Recommendations
Upgrade to CloudburstMC Protocol version 3.0.0.Beta12-20260420.182526-15 or later, where the authentication validation issue has been patched. No other mitigations or temporary fixes are documented. Patch status is confirmed by the vendor advisory stating the fix is included in that version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-11T20:14:43.201Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1f41c3e29bf47b5000d1a1
Added to database: 06/02/2026, 20:49:07 UTC
Last enriched: 06/10/2026, 11:16:18 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 83
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