CVE-2026-109478
HIGHCVSS 7.5/10
Last modified
CVE-2026-109478 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network..
Description
Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 8.0 installed on Linux | >= 8.0.0, < 8.0.34 |
| Microsoft | .NET 8.0 installed on Mac OS | >= 8.0.0, < 8.0.34 |
| Microsoft | .NET 8.0 installed on Windows | >= 8.0.0, < 8.0.34 |
| Microsoft | .NET 9.0 installed on Linux | >= 9.0.0, < 9.0.0-preview.4.24266.19 |
| Microsoft | .NET 9.0 installed on Mac OS | >= 9.0.0, < 9.0.0-preview.4.24266.19 |
| Microsoft | .NET 9.0 installed on Windows | >= 9.0.0, < 9.0.0-preview.4.24266.19 |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | >= 17.14.0, < 17.14.45 |
| Microsoft | Microsoft Visual Studio 2026 version 18.11 | >= 18.11.0, < 18.11.4 |
| Microsoft | Microsoft Visual Studio 2026 version 18.12 | >= 18.12.0, < 18.12.0 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-109478?
Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.
How severe is CVE-2026-109478?
CVE-2026-109478 has a CVSS score of 7.5/10 (HIGH severity).
How do I fix CVE-2026-109478?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-109478?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST