What is RHSA-2026:25221?

RHSA-2026:25221 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: .NET 9.0 security update

Which CVE IDs does RHSA-2026:25221 cover?

RHSA-2026:25221 covers the following CVE IDs: CVE-2026-45491, CVE-2026-45591. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:25221?

RHSA-2026:25221 has a CVSS v3 base score of 7.5, published by Red Hat Product Security.

RHSA-2026:25221HighCVSS 7.5

Red Hat Security Advisory: .NET 9.0 security update

Vendor

Red Hat Product Security

Published

June 11, 2026

Last Modified

June 11, 2026

🔗 CVE IDs covered (2)

CVE-2026-45491 →CVE-2026-45591 →

📋 Description

CVE-2026-45491 — dotnet: .NET: Local file tampering via link following vulnerability CVE-2026-45591 — dotnet: ASP.NET Core: Denial of Service via uncontrolled resource consumption

🔗 References (5)

selfhttps://access.redhat.com/errata/RHSA-2026:25221
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2487164
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2487224
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_25221.json