Microsoft ASP.NET Core allocation of resources

Summaryinfo

A vulnerability was found in Microsoft ASP.NET Core. It has been declared as problematic. The affected element is an unknown function. Such manipulation leads to allocation of resources. This vulnerability is listed as CVE-2026-26130. The attack may be performed from remote. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Microsoft ASP.NET Core (version now known). Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.

The weakness was presented 03/10/2026 as confirmed security update guide (Website). The advisory is shared for download at msrc.microsoft.com. This vulnerability is handled as CVE-2026-26130. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/13/2026). The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 302042 (RHEL 10 : .NET 9.0 (RHSA-2026:4450)), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (302042) and CERT Bund (WID-SEC-2026-0657). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Red Hat Enterprise Linux
• Ubuntu Linux
• Oracle Linux
• RESF Rocky Linux
• Microsoft ASP.NET
• Microsoft .NET

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Vendor

• Microsoft

Name

• ASP.NET Core

License

• open-source

Website

• Vendor: https://www.microsoft.com/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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