{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-69304", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-08-03T20:46:07.440Z", "datePublished": "2026-09-08T17:17:47.686Z", "dateUpdated": "2026-09-08T19:34:17.319Z"}, "containers": {"cna": {"title": "ASP.NET Core Denial of Service Vulnerability", "datePublic": "2026-09-08T14:00:00.000Z", "cpeApplicability": [{"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"}]}]}], "affected": [{"vendor": "Microsoft", "product": ".NET 10.0", "versions": [{"version": "10.0.0", "lessThan": "10.0.12", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 8.0", "versions": [{"version": "8.0.0", "lessThan": "8.0.31", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 9.0", "versions": [{"version": "9.0.0", "lessThan": "9.0.20", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "ASP.NET Core 10.0", "versions": [{"version": "10.0", "lessThan": "10.0.12", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "ASP.NET Core 11.0", "versions": [{"version": "11.0", "lessThan": "11.0 RC1", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "ASP.NET Core 8.0", "versions": [{"version": "8.0", "lessThan": "8.0.31", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "ASP.NET Core 9.0", "versions": [{"version": "9.0", "lessThan": "9.0.20", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2022 version 17.14", "versions": [{"version": "17.14.0", "lessThan": "17.14.40", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2026 version 18.9", "versions": [{"version": "18.9.0", "lessThan": "18.9.3", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)", "lang": "en-US", "type": "CWE", "cweId": "CWE-409"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-09-08T18:38:01.002Z"}, "references": [{"name": "ASP.NET Core Denial of Service Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 5.9, "vectorString": "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"}}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-08T19:33:58.502592Z", "id": "CVE-2026-69304", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-08T19:34:17.319Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": ".NET 10.0", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.12", "status": "affected", "version": "10.0.0", "versionType": "custom"}]}, {"product": ".NET 8.0", "vendor": "Microsoft", "versions": [{"lessThan": "8.0.31", "status": "affected", "version": "8.0.0", "versionType": "custom"}]}, {"product": ".NET 9.0", "vendor": "Microsoft", "versions": [{"lessThan": "9.0.20", "status": "affected", "version": "9.0.0", "versionType": "custom"}]}, {"product": "ASP.NET Core 10.0", "vendor": "Microsoft", "versions": [{"lessThan": "10.0.12", "status": "affected", "version": "10.0", "versionType": "custom"}]}, {"product": "ASP.NET Core 11.0", "vendor": "Microsoft", "versions": [{"lessThan": "11.0 RC1", "status": "affected", "version": "11.0", "versionType": "custom"}]}, {"product": "ASP.NET Core 8.0", "vendor": "Microsoft", "versions": [{"lessThan": "8.0.31", "status": "affected", "version": "8.0", "versionType": "custom"}]}, {"product": "ASP.NET Core 9.0", "vendor": "Microsoft", "versions": [{"lessThan": "9.0.20", "status": "affected", "version": "9.0", "versionType": "custom"}]}, {"product": "Microsoft Visual Studio 2022 version 17.14", "vendor": "Microsoft", "versions": [{"lessThan": "17.14.40", "status": "affected", "version": "17.14.0", "versionType": "custom"}]}, {"product": "Microsoft Visual Studio 2026 version 18.9", "vendor": "Microsoft", "versions": [{"lessThan": "18.9.3", "status": "affected", "version": "18.9.0", "versionType": "custom"}]}], "source": "secure@microsoft.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network."}], "id": "CVE-2026-69304", "lastModified": "2026-09-08T19:22:18.470", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "secure@microsoft.com", "type": "Primary"}]}, "published": "2026-09-08T18:18:46.347", "references": [{"source": "secure@microsoft.com", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69304"}], "sourceIdentifier": "secure@microsoft.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-409"}], "source": "secure@microsoft.com", "type": "Primary"}]}

{}

{}