What is CVE-2026-40306?

CVE-2026-40306 is a medium-severity vulnerability in Dnnsoftware Dnn.platform, classified under Use of Insufficiently Random Values. CVSS score: 6.5/10. Published 2026-04-17.

How severe is CVE-2026-40306?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Dnnsoftware Dnn.platform

CVE-2026-40306

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 pa…

EPSS: 0.002 (7.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Dnnsoftware Dnn.platform — versions >= 10.0.0, < 10.2.2
Dnnsoftware Dotnetnuke

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-40306?: CVE-2026-40306 is a medium-severity vulnerability in Dnnsoftware Dnn.platform, classified under Use of Insufficiently Random Values. CVSS score: 6.5/10. Published 2026-04-17.
How severe is CVE-2026-40306?: Medium severity. CVSS v3 base score is 6.5 out of 10.