Jun 2026: ASP.NET Core Denial of Service Vulnerability
CVE-2026-45591 Published on June 9, 2026

ASP.NET Core Denial of Service Vulnerability
Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-45591 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Types

What is a Resource Exhaustion Vulnerability?

The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

CVE-2026-45591 has been classified to as a Resource Exhaustion vulnerability or weakness.

Allocation of Resources Without Limits or Throttling

The software 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.


Products Associated with CVE-2026-45591

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-45591 are published in these products:

Microsoft Visual Studio 2026
 
Microsoft Net
 
Microsoft ASP.NET Core
 
Canonical Ubuntu Linux
 
Red Hat Enterprise Linux Eus
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Rhel E4s
 
Red Hat Rhel Eus
 
Red Hat Hummingbird
 

Affected Versions

Microsoft .NET 10.0: Microsoft .NET 8.0: Microsoft .NET 9.0: Microsoft ASP.NET Core 10.0: Microsoft ASP.NET Core 8.0: Microsoft ASP.NET Core 9.0: Microsoft Visual Studio 2026 version 18.6: Red Hat Enterprise Linux AppStream EUS (v. 10.0): Red Hat Enterprise Linux AppStream (v. 10): Red Hat Enterprise Linux AppStream (v. 8): Red Hat Enterprise Linux AppStream E4S (v.9.4): Red Hat Enterprise Linux AppStream EUS (v.9.6): Red Hat Enterprise Linux AppStream (v. 9): Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0): Red Hat Enterprise Linux CodeReady Linux Builder (v. 10): Red Hat Enterprise Linux CRB (v. 8): Red Hat CodeReady Linux Builder EUS (v.9.6): Red Hat Enterprise Linux CodeReady Linux Builder (v. 9): Red Hat Hardened Images:

Exploit Probability

EPSS
0.75%
Percentile
50.10%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.