critical9.1
CVE-2026-40372
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
Impact
Improper verification of cryptographic signature in ASP.NET Core allows an unauthorized attacker to elevate privileges over a network.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Microsoft.AspNetCore.DataProtection | >= 10.0.0, <= 10.0.6 | 10.0.7 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Asp.Net Core | from 10.0.0 before 10.0.7 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-9mv3-2cwr-p262
- https://github.com/dotnet/aspnetcore/security/advisories/GHSA-9mv3-2cwr-p262
- https://nvd.nist.gov/vuln/detail/CVE-2026-40372
- https://github.com/dotnet/announcements/issues/395
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40372
- https://access.redhat.com/security/cve/CVE-2026-40372
- https://bugzilla.redhat.com/show_bug.cgi?id=2460224
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40372.json