CVE-2026-40306: DNN: Same HostGUID for all new installs

April 10, 2026 (updated April 24, 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.

References

github.com/advisories/GHSA-2rhw-gw3f-477j
github.com/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
github.com/dnnsoftware/Dnn.Platform/security/advisories/GHSA-2rhw-gw3f-477j
nvd.nist.gov/vuln/detail/CVE-2026-40306

Code Behaviors & Features

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