RHSA-2026:8468 — Security Advisory

An update for .NET 8.0 is now available for Red Hat Enterprise Linux 8.

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.

.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 SDK_VERSION and .NET Runtime RUNTIME_VERSION.Security Fix(es):

• dotnet: .NET: Security Bypass and Denial of Service Vulnerability (CVE-2026-26171)

• dotnet: .NET: Denial of Service via stack overflow (CVE-2026-32203)

• dotnet: .NET: Denial of Service via Infinite Recursion in XmlDecryptionTransform (CVE-2026-33116)

• dotnet: Dotnet: SMTP Command Injection and Header Injection via MailAddress parsing flaw (CVE-2026-32178)

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.

Security Fix(es):

• dotnet: .NET: Security Bypass and Denial of Service Vulnerability (CVE-2026-26171)

• dotnet: .NET: Denial of Service via stack overflow (CVE-2026-32203)

• dotnet: .NET: Denial of Service via Infinite Recursion in XmlDecryptionTransform (CVE-2026-33116)

• dotnet: Dotnet: SMTP Command Injection and Header Injection via MailAddress parsing flaw (CVE-2026-32178)

Bug Fix(es) and Enhancement(s):

• Update .NET 8.0 to SDK 8.0.126 and Runtime 8.0.26 (JIRA:RHEL-163413)

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.