TI-2026-33091 Aliases CVE-2026-45291

Cloudburst Network erroneously handles invalid connections

LOW 38CWE-20Published 2026-06-05 · Updated 2026-06-08

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Cloudburst Network provides network components used within Cloudburst projects. A vulnerability in versions prior to `1.0.0.CR3-20260418.124334-32` impacts publicly accessible software depending on the affected versions of Network and allows an attacker to exploit a bug in Network to close the parent netty channel, rendering it inoperable. All consumers of the library should upgrade to at least version `1.0.0.CR3-20260418.124334-32`. There are no known workarounds beyond updating the library.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00263 18th percentileScored 2026-11-07

Fix Fixed Network (CloudburstMC): 1.0.0.CR3-20260418.124334-32

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	Network	before 1.0.0.CR3-20260418.124334-32	1.0.0.CR3-20260418.124334-32	Patch available	CNA

Network VendorCloudburstMC Affected before 1.0.0.CR3-20260418.124334-32 Fixed in 1.0.0.CR3-20260418.124334-32 Patch available CNA

Remediation

Fix · CNA Network (CloudburstMC) Fixed in 1.0.0.CR3-20260418.124334-32

Timeline

2026-10-02 Threatist record created from CVE-2026-45291

References

Other 1

https://github.com/CloudburstMC/Network/security/advisories/GHSA-rh6x-g5c8-2rmf

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-2026-33089 CloudburstMC Protocol: Partially missing validation for FULL type authentication tokens CVSS 3.1MEDIUM 5.3

Sources

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