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CVE-2026-69304ASP.NET Core Denial of Service Vulnerability
- 5.9MediumCVSS base score
- 0.85%Exploitation in 30 daysEPSS · top 41% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Timeline
ID reserved
By microsoft
- 36 days later
· 36 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | Medium5.9 | 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 |
| NVDNVD · Analyzed | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.85% · top 41% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Affected products
- affected 10.0.0 – < 10.0.12
- affected 8.0.0 – < 8.0.31
- affected 9.0.0 – < 9.0.20
- affected 10.0 – < 10.0.12
- affected 11.0 – < 11.0 RC1
- affected 8.0 – < 8.0.31
- affected 9.0 – < 9.0.20
Microsoft · Microsoft Visual Studio 2022 version 17.14
- affected 17.14.0 – < 17.14.40
Microsoft · Microsoft Visual Studio 2026 version 18.9
- affected 18.9.0 – < 18.9.3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- NuGetMicrosoft.AspNetCore.Server.IISIntegrationGHSA-8cp2-47hg-mfgh (opens in a new tab)
References
References1
- ASP.NET Core Denial of Service Vulnerability (opens in a new tab)vendor-advisorypatch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-73741 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-8cp2-47hg-mfgh (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-69304)Record last updated .