CVE-2026-40306 json
DNN has same HostGUID for all new installs
published 2026-04-10 6 mo ago modified 2026-10-26 13 d ago also GHSA-2rhw-gw3f-477j , EUVD-2026-23556
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
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.
Patch / fix
- nuget DotNetNuke.Core 10.2.2
- dnnsoftware dotnetnuke 10.2.2
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | 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 |
| CNA | 4.0 | 6.9 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | DotNetNuke.Core | >=10.0.0, <10.2.2 |
10.2.2 |
Affected products
- dnnsoftware Dnn.Platform
Classification
- Weakness
-
- CWE-330 Use of Insufficiently Random Values
References
-
github.com
/dnnsoftware/Dnn.Platform/security/advisories/GHSA-2rhw-gw3f-477j
web, vendor-advisory
-
github.com
/dnnsoftware/Dnn.Platform/releases/tag/v10.2.2
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-40306
advisory
-
github.com
/dnnsoftware/Dnn.Platform
package
Sources
- CVE List CVE-2026-40306
- GitHub Advisory GHSA-2rhw-gw3f-477j
- NVD CVE-2026-40306
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.