CVE-2026-40306 — Vulnerability in DotNetNuke.Core — CVE Details

MEDIUM

DNN: Same HostGUID for all new installs

Published April 10, 2026Updated May 5, 2026Source: osv

Summary

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.

Advisory Timeline

First published April 10, 2026 (185 days ago).
Last revised May 5, 2026 — 25 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update DotNetNuke.Core to 10.2.2 or later

dotnet add package DotNetNuke.Core --version 10.2.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

Package	Ecosystem	Affected	Fixed In
DotNetNuke.Core	nuget	10.0.0, 10.0.1, 10.1.0, 10.1.1 (+3 more)	10.2.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-330
Use of Insufficiently Random ValuesMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 6.5 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References

Frequently Asked Questions

What is CVE-2026-40306?: DNN: Same HostGUID for all new installs This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 6.5/10).
How do I check if my project is affected by CVE-2026-40306?: CVE-2026-40306 affects DotNetNuke.Core. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-40306 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

6.5

Exploitation requires specific conditions or has limited impact. Remediate within weeks.

Also Known As

GHSA-2rhw-gw3f-477j

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