CVE-2026-40306 json
DNN has same HostGUID for all new installs
published 6mo ago modified 14d ago also EUVD-2026-23556 , GHSA-2rhw-gw3f-477j
- 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
Is CVE-2026-40306 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 6mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-09).
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 |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A: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 |
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 Intel 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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.