CVE-2026-45591: high-severity vulnerability in Microsoft ASP.NET Core 10.0
ASP.NET Core Denial of Service Vulnerability
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 2.4%
exploitation probability
2.4%top 16% of all CVEs
observed exploitation
nono source reports it
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · ASP.NET Core 10.0Microsoft · ASP.NET Core 8.0Microsoft · ASP.NET Core 9.0Microsoft · Microsoft Visual Studio 2026 version 18.6Microsoft · .NET 10.0Microsoft · .NET 8.0Microsoft · .NET 9.0Related CVEs — Microsoft ASP.NET Core 10.0
In the same product, most dangerous first.
CVE-2025-55315CRITICALASP.NET Security Feature Bypass VulnerabilityEPSS 65.9%CVE-2023-36038HIGHASP.NET Core Denial of Service VulnerabilityEPSS 2.8%CVE-2026-26130HIGHASP.NET Core Denial of Service VulnerabilityEPSS 2.5%CVE-2024-21386HIGH.NET Denial of Service VulnerabilityEPSS 2.4%CVE-2025-26682HIGHASP.NET Core and Visual Studio Denial of Service VulnerabilityEPSS 1.7%CVE-2023-36558MEDIUMASP.NET Core Security Feature Bypass VulnerabilityEPSS 1.1%
References
https://access.redhat.com/errata/RHSA-2026:17527https://access.redhat.com/errata/RHSA-2026:25110https://access.redhat.com/errata/RHSA-2026:25111https://access.redhat.com/errata/RHSA-2026:25112https://access.redhat.com/errata/RHSA-2026:25113https://access.redhat.com/errata/RHSA-2026:25114https://access.redhat.com/errata/RHSA-2026:25115https://access.redhat.com/errata/RHSA-2026:25220https://access.redhat.com/errata/RHSA-2026:25221https://access.redhat.com/errata/RHSA-2026:25222https://access.redhat.com/errata/RHSA-2026:26638https://access.redhat.com/errata/RHSA-2026:26994