CVE-2026-45591
ASP.NET Core Denial of Service Vulnerability
7.5
HIGH
CVSS 3.1
EPSS 2.4%
Description
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
How to fix CVE-2026-45591
To remediate CVE-2026-45591, upgrade the affected package to a fixed version below.
- NuGet/Microsoft.AspNetCore.App.Runtime.linux-x64—upgrade to 8.0.28 or later
- NuGet/Microsoft.AspNetCore.App.Runtime.osx-arm64—upgrade to 8.0.28 or later
- —upgrade to 8.0.28 or later
- —upgrade to 8.0.28 or later
Is CVE-2026-45591 being exploited?
Low — EPSS is 2.4%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- >= 8.0.0, < 8.0.28
- >= 8.0.0, < 8.0.28
- >= 8.0.0, < 8.0.28
- >= 8.0.0, < 8.0.28
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |