Microsoft ASP.NET Core Resource Manager allocation of resources

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Microsoft ASP.NET Core. The impacted element is an unknown function of the component Resource Manager. The manipulation leads to allocation of resources. This vulnerability is uniquely identified as CVE-2026-45646. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Microsoft ASP.NET Core (affected version unknown). This issue affects an unknown functionality of the component Resource Manager. 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. The summary by CVE is:

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

It is possible to read the advisory at msrc.microsoft.com. The identification of this vulnerability is CVE-2026-45646 since 05/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/14/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Microsoft

Name

• ASP.NET Core

License

• open-source

Website

• Vendor: https://www.microsoft.com/

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