CVE-2026-40306 PUBLISHED

DNN has same HostGUID for all new installs

Assigner: GitHub_M
Reserved: 10.04.2026 Published: 17.04.2026 Updated: 17.04.2026

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. All new installations of DNN 10.x.x - 10.2.1 have the same Host GUID. This does not affect upgrades from 9.x.x. Version 10.2.2 patches the issue.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	dnnsoftware
Product	Dnn.Platform
Versions	Version >= 10.0.0, < 10.2.2 is affected

References

https://github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-2rhw-gw3f-477j
https://github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2

Problem Types

CWE-330: Use of Insufficiently Random Values CWE