CVE-2026-45591
ASP.NET Core Denial of Service Vulnerability
At a glance
- Severity
- HIGH 7.5
- EPSS
- EPSS 2.48 % · percentile 84 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Modified
Description
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | 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 | microsoft |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · secure@microsoft.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Weaknesses (CWE)
Advisories
- GHSA-f8h2-vmm9-qhj6 — Microsoft Security Advisory CVE-2026-45591 – ASP.NET Core Denial of Service Vulnerability
European references
- ENISA EUVD · EUVD-2026-35549
- GCVE · GCVE-0-2026-45591
CERT-FR advisories
- CERTFR-2026-AVI-0796 — Multiples vulnérabilités dans Tenable Identity Exposure · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0731 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0729 — Multiples vulnérabilités dans Microsoft .Net · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0728 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*≥ 8.0.0 < 8.0.28cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*≥ 9.0.0 < 9.0.17cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*≥ 10.0.0 < 10.0.9cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*≥ 18.6.0 < 18.6.3cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*≥ 8.0.0 < 8.0.28cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*≥ 9.0.0 < 9.0.17cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*≥ 10.0.0 < 10.0.9
Affected products
| Product | Versions |
|---|---|
| Microsoft · .NET 10.0 | affected 10.0.0 < 10.0.9 |
| Microsoft · .NET 8.0 | affected 8.0.0 < 8.0.28 |
| Microsoft · .NET 9.0 | affected 9.0.0 < 9.0.17 |
| Microsoft · ASP.NET Core 10.0 | affected 10.0 < 10.0.9 |
| Microsoft · ASP.NET Core 8.0 | affected 8.0 < 8.0.28 |
| Microsoft · ASP.NET Core 9.0 | affected 9.0 < 9.0.17 |
| Microsoft · Microsoft Visual Studio 2026 version 18.6 | affected 18.6.0 < 18.6.3 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45591
- https://access.redhat.com/security/cve/CVE-2026-45591
- https://bugzilla.redhat.com/show_bug.cgi?id=2487224
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45591.json
- https://access.redhat.com/errata/RHSA-2026:28007
- https://access.redhat.com/errata/RHSA-2026:28009
- https://access.redhat.com/errata/RHSA-2026:25115
- https://access.redhat.com/errata/RHSA-2026:25111
- https://access.redhat.com/errata/RHSA-2026:25112
- https://access.redhat.com/errata/RHSA-2026:25114
- https://access.redhat.com/errata/RHSA-2026:25110
- https://access.redhat.com/errata/RHSA-2026:25113
- https://access.redhat.com/errata/RHSA-2026:28227
- https://access.redhat.com/errata/RHSA-2026:28011
- https://access.redhat.com/errata/RHSA-2026:28051
- https://access.redhat.com/errata/RHSA-2026:25222
- https://access.redhat.com/errata/RHSA-2026:25220
- https://access.redhat.com/errata/RHSA-2026:25221
- https://access.redhat.com/errata/RHSA-2026:26638
- https://access.redhat.com/errata/RHSA-2026:26994
- https://access.redhat.com/errata/RHSA-2026:17527
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |