CVE-2026-69304Medium· 5.9▾ SunlitImproper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
▾ Sunlit zone — Low / medium · no exploitation signal
impact 32.5 · likelihood 0.2 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 10.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.8%
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
Microsoft.AspNetCore.Server.IISIntegration >= 11.0.0-preview.1, < 11.0.0-rc.1Microsoft.AspNetCore.Server.IISIntegration >= 8.0.0, <= 8.0.30Microsoft.AspNetCore.Server.IISIntegration >= 9.0.0, <= 9.0.19Microsoft.AspNetCore.Server.IISIntegration >= 10.0.0, <= 10.0.11Patched in:
Microsoft.AspNetCore.Server.IISIntegration 11.0.0-rc.1Microsoft.AspNetCore.Server.IISIntegration 8.0.31Microsoft.AspNetCore.Server.IISIntegration 9.0.20Microsoft.AspNetCore.Server.IISIntegration 10.0.12Connected by shared product, vendor, weakness, or advisory.
GHSA-v3f6-m9j2-437pMedium· 5.9Duplicate Advisory: Microsoft Security Advisory CVE-2026-69304 – ASP.NET Core Denial of Service Vulnerability
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