Description
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Affected products
microsoft: asp.net core; microsoft: visual studio 2022; microsoft: visual studio 2026; microsoft: .net; microsoft: windows
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304 PatchVendor Advisory
Metrics
- CVSS 3.1
-
5.9
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 58 · as of 4 November 2026
- CWE
- CWE-409
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.