CVE intelligence

CVE-2026-69304

Vulnerability intelligence

Published Sep 8, 2026Sources checked Oct 28, 2026

5.9MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-69304 and is rated Medium severity with a CVSS score of 5.9. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Sep 25, 2026

Vendor remediation details

Release Notes Install KB5126106. Install KB5126105. Install KB5126104.

Vendor-listed releases

11.0 RC1
10.0.12
9.0.20
8.0.31
18.9.3
17.14.40

CISA KEVNot listedBased on the latest collected catalog

EPSS0.9%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-69304?

Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Source: NVD