RHSA-2026:28051 — Security Advisory
Red Hat Security Advisory: .NET 9.0 security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · June 30, 2026
Updated · July 2, 2026
Topic
An update for .NET 9.0 is now available for Red Hat Enterprise Linux 9.6 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.
New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 9.0.118 and .NET Runtime 9.0.17.
Security Fix(es):
-
dotnet: .NET: Local file tampering via link following vulnerability (CVE-2026-45491)
-
dotnet: ASP.NET Core: Denial of Service via uncontrolled resource consumption (CVE-2026-45591)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.