{"id":"CVE-2026-69304","aliases":[],"cve":{"records":[{"id":"CVE-2026-69304","source":"microsoft","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-08-03T20:46:07.440Z","published":"2026-09-08T17:17:47.686Z","modified":"2026-10-30T21:56:07.330Z"}],"publishers":[{"name":"microsoft","role":"CNA","organizationId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","modified":"2026-10-30T21:56:07.330Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-09-08T19:34:17.319Z"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304","tags":["vendor-advisory","patch"],"source":"microsoft"}],"weaknesses":[{"id":"CWE-409","description":"CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)","source":"microsoft"}],"applicability":[{"source":"microsoft","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*","versionStartIncluding":"11.0","versionEndExcluding":"11.0 RC1"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.0","versionEndExcluding":"10.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.0.20"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.0.31"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*","versionStartIncluding":"18.9.0","versionEndExcluding":"18.9.3"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.14.0","versionEndExcluding":"17.14.40"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0","versionEndExcluding":"9.0.20"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0","versionEndExcluding":"10.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0","versionEndExcluding":"8.0.31"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-09-08T19:33:58.502592Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"ASP.NET Core Denial of Service Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","description":"Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.","score":5.9,"severity":"medium","published":"2026-09-08T17:17:47.686Z","modified":"2026-10-30T21:56:07.330Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Microsoft","name":".NET 10.0 runtime","platforms":[],"versions":[{"version":"10.0.0","status":"affected","lessThan":"10.0.12","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":".NET 8.0 runtime","platforms":[],"versions":[{"version":"8.0.0","status":"affected","lessThan":"8.0.31","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":".NET 9.0 runtime","platforms":[],"versions":[{"version":"9.0.0","status":"affected","lessThan":"9.0.20","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":"ASP.NET Core 10.0","platforms":[],"versions":[{"version":"10.0","status":"affected","lessThan":"10.0.12","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":"ASP.NET Core 11.0","platforms":[],"versions":[{"version":"11.0","status":"affected","lessThan":"11.0 RC1","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":"ASP.NET Core 8.0","platforms":[],"versions":[{"version":"8.0","status":"affected","lessThan":"8.0.31","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":"ASP.NET Core 9.0","platforms":[],"versions":[{"version":"9.0","status":"affected","lessThan":"9.0.20","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":"Microsoft Visual Studio 2022 version 17.14","platforms":[],"versions":[{"version":"17.14.0","status":"affected","lessThan":"17.14.40","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"},{"vendor":"Microsoft","name":"Microsoft Visual Studio 2026 version 18.9","platforms":[],"versions":[{"version":"18.9.0","status":"affected","lessThan":"18.9.3","versionType":"custom"}],"cpes":[],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"}],"remediation":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304"],"sources":[{"name":"CVE","id":"CVE-2026-69304","modified":"2026-10-30T21:56:07.330Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"}],"assessments":[{"source":"microsoft","vector":"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","score":5.9}],"sourceAffected":[],"observedAt":"2026-10-30T22:49:15.935Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T08:35:32.065Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-31T05:15:34.112Z","attemptedAt":"2026-10-31T05:15:34.112Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-31T05:15:33.222Z","attemptedAt":"2026-10-31T05:15:33.222Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-31T05:15:32.896Z","attemptedAt":"2026-10-31T05:15:32.896Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-31T05:15:33.487Z","attemptedAt":"2026-10-31T05:15:33.487Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-73741","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-73741","modified":"Oct 30, 2026, 9:56:07 PM","score":5.9,"vector":"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","checkedAt":"2026-10-31T05:15:32.896Z"},{"source":"GitHub Advisory Database","id":"GHSA-8cp2-47hg-mfgh","url":"https://github.com/advisories/GHSA-8cp2-47hg-mfgh","modified":"2026-09-09T16:04:12Z","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-31T05:15:33.222Z"},{"source":"FIRST EPSS","id":"CVE-2026-69304","url":"https://www.first.org/epss/","probability":0.00855,"percentile":0.58321,"date":"2026-10-30","checkedAt":"2026-10-31T05:15:33.487Z"},{"source":"NVD","id":"CVE-2026-69304","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69304","modified":"2026-10-30T22:17:12.600","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-31T05:15:34.112Z"},{"source":"NVD","id":"CVE-2026-69304","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69304","modified":"2026-10-30T22:17:12.600","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","checkedAt":"2026-10-31T05:15:34.112Z"}],"aiSummary":{"text":"ASP.NET Core and .NET runtime versions are affected by a denial-of-service vulnerability due to improper handling of highly compressed data. An unauthorized attacker can exploit this over a network. Affected versions include .NET 8.0 to 10.0 and ASP.NET Core 8.0 to 11.0.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T01:16:06.117Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-69304"}]}}