{"id":"CVE-2026-45591","published":"2026-06-09T17:05:29Z","modified":"2026-09-24T13:44:25Z","title":"ASP.NET Core Denial of Service Vulnerability","vendor":"Microsoft","product":".NET 10.0","tier":"tail","description":{"text":"Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"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","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.02481,"percentile":0.84522,"provenance":"source"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591","tags":["vendor-advisory","patch"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-45591","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487224","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45591.json","tags":["x_sadp-csaf-vex"]},{"url":"https://access.redhat.com/errata/RHSA-2026:28007","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:28009","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25115","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25111","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25112","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25114","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25110","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25113","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:28227","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:28011","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:28051","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25222","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25220","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:25221","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:26638","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:26994","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:17527","tags":["vendor-advisory","x_refsource_REDHAT"]}],"priority":{"score":22.2,"factors":[{"name":"EPSS percentile","points":16.9},{"name":"CVSS severity","points":5.25}]},"vendorSlug":"microsoft","affectedVersions":[{"vendor":"Microsoft","product":".NET 10.0","versions":[">= 10.0.0, < 10.0.9"]},{"vendor":"Microsoft","product":".NET 8.0","versions":[">= 8.0.0, < 8.0.28"]},{"vendor":"Microsoft","product":".NET 9.0","versions":[">= 9.0.0, < 9.0.17"]},{"vendor":"Microsoft","product":"ASP.NET Core 10.0","versions":[">= 10.0, < 10.0.9"]},{"vendor":"Microsoft","product":"ASP.NET Core 8.0","versions":[">= 8.0, < 8.0.28"]},{"vendor":"Microsoft","product":"ASP.NET Core 9.0","versions":[">= 9.0, < 9.0.17"]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.6","versions":[">= 18.6.0, < 18.6.3"]}],"affected":[{"ecosystem":"NuGet","package":"Microsoft.AspNetCore.App.Runtime.linux-x64","vulnerableRanges":[">=8.0.0, <8.0.28",">=9.0.0, <9.0.17",">=10.0.0, <10.0.9"],"patched":["8.0.28","9.0.17","10.0.9"],"from":["GHSA-f8h2-vmm9-qhj6"],"provenance":"source"},{"ecosystem":"NuGet","package":"Microsoft.AspNetCore.App.Runtime.win-x64","vulnerableRanges":[">=8.0.0, <8.0.28",">=9.0.0, <9.0.17",">=10.0.0, <10.0.9"],"patched":["8.0.28","9.0.17","10.0.9"],"from":["GHSA-f8h2-vmm9-qhj6"],"provenance":"source"},{"ecosystem":"NuGet","package":"Microsoft.AspNetCore.App.Runtime.osx-arm64","vulnerableRanges":[">=8.0.0, <8.0.28",">=9.0.0, <9.0.17",">=10.0.0, <10.0.9"],"patched":["8.0.28","9.0.17","10.0.9"],"from":["GHSA-f8h2-vmm9-qhj6"],"provenance":"source"},{"ecosystem":"NuGet","package":"Microsoft.AspNetCore.SignalR.Protocols.MessagePack","vulnerableRanges":[">=8.0.0, <8.0.28",">=9.0.0, <9.0.17",">=10.0.0, <10.0.9"],"patched":["8.0.28","9.0.17","10.0.9"],"from":["GHSA-f8h2-vmm9-qhj6"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-35549","exploited":false,"provenance":"source"},"lineage":{"packageHistory":[{"cve":"CVE-2026-26130","published":"2026-03-10","fixed":"10.0.4","kev":false},{"cve":"CVE-2026-56170","published":"2026-07-14","fixed":"10.0.6","kev":false},{"cve":"CVE-2026-42899","published":"2026-05-12","fixed":"10.0.8","kev":false,"link":{"from":"CVE-2026-42899","to":"CVE-2026-45591","relation":"successor","confidence":"medium","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"NuGet:Microsoft.AspNetCore.App.Runtime.linux-x64","fromFixed":"8.0.27","toFixed":"8.0.28","daysApart":28},{"kind":"version-step","provenance":"source","package":"NuGet:Microsoft.AspNetCore.App.Runtime.linux-x64","fromFixed":"10.0.8","toFixed":"10.0.9","daysApart":28},{"kind":"similar","provenance":"machine","score":0.44,"basis":"same product + description similarity"}]}},{"cve":"CVE-2026-45591","published":"2026-06-09","fixed":"10.0.9","kev":false},{"cve":"CVE-2026-70175","published":"2026-10-13","fixed":"10.0.13","kev":false},{"cve":"CVE-2026-70181","published":"2026-10-13","fixed":"10.0.13","kev":false},{"cve":"CVE-2026-70186","published":"2026-10-13","fixed":"10.0.13","kev":false}],"package":"NuGet:Microsoft.AspNetCore.App.Runtime.linux-x64"}}