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Medium 5.9Published Sep 8, 2026
CVE-2026-69304ASP.NET Core Denial of Service Vulnerability
Updated under an hour ago ()
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It affects Microsoft .NET 10.0 and 12 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- CVSS
- 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-409
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft .NET 10.0 microsoft:net_10.0 (from the name) | from 10.0.0 before 10.0.12 | CNA record |
Microsoft .NET 8.0 microsoft:net_8.0 (from the name) | from 8.0.0 before 8.0.31 | CNA record |
Microsoft .NET 9.0 microsoft:net_9.0 (from the name) | from 9.0.0 before 9.0.20 | CNA record |
Microsoft ASP.NET Core 10.0 microsoft:asp.net_core_10.0 (from the name) | from 10.0 before 10.0.12 | CNA record |
Microsoft ASP.NET Core 11.0 microsoft:asp.net_core_11.0 (from the name) | 11.0 builds before 11.0 RC1 | CNA record |
Microsoft ASP.NET Core 8.0 microsoft:asp.net_core_8.0 (from the name) | from 8.0 before 8.0.31 | CNA record |
Microsoft ASP.NET Core 9.0 microsoft:asp.net_core_9.0 (from the name) | from 9.0 before 9.0.20 | CNA record |
Microsoft Microsoft Visual Studio 2022 version 17.14 microsoft:visual_studio_2022_version_17.14 (from the name) | from 17.14.0 before 17.14.40 | CNA record |
Microsoft Microsoft Visual Studio 2026 version 18.9 microsoft:visual_studio_2026_version_18.9 (from the name) | from 18.9.0 before 18.9.3 | CNA record |
microsoft asp.net_core microsoft:asp.net_core | from 8.0.0 before 8.0.28; from 9.0.0 before 9.0.17; from 10.0.0 before 10.0.9; after 11.0.0; 11.0 | NVD |
microsoft visual_studio_2022 microsoft:visual_studio_2022 | from 17.14.0 before 17.14.40 | NVD |
microsoft visual_studio_2026 microsoft:visual_studio_2026 | from 18.9.0 before 18.9.3 | NVD |
microsoft .net microsoft:.net | from 8.0.0 before 8.0.31; from 9.0.0 before 9.0.20; from 10.0.0 before 10.0.12 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304vendor-advisory, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.