{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-109478", "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "state": "PUBLISHED", "assignerShortName": "microsoft", "dateReserved": "2026-10-12T17:01:11.371Z", "datePublished": "2026-11-10T18:15:23.710Z", "dateUpdated": "2026-11-10T23:46:50.125Z"}, "containers": {"cna": {"title": "ASP.NET Core Denial of Service Vulnerability", "datePublic": "2026-11-10T16:00:00.000Z", "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net_9.0_installed_on_linux:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.0.0-preview.4.24266.19"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net_9.0_installed_on_mac_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.0.0-preview.4.24266.19"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net_9.0_installed_on_windows:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.0.0-preview.4.24266.19"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net_8.0_installed_on_windows:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndExcluding": "8.0.34"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net_8.0_installed_on_linux:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndExcluding": "8.0.34"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net_8.0_installed_on_mac_os:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndExcluding": "8.0.34"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*", "versionStartIncluding": "17.14.0", "versionEndExcluding": "17.14.45"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.11:*:*:*:*:*:*:*:*", "versionStartIncluding": "18.11.0", "versionEndExcluding": "18.11.4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:microsoft_visual_studio_2026_version_18.12:*:*:*:*:*:*:*:*", "versionStartIncluding": "18.12.0", "versionEndExcluding": "18.12.0"}]}]}], "affected": [{"vendor": "Microsoft", "product": ".NET 8.0 installed on Linux", "versions": [{"version": "8.0.0", "lessThan": "8.0.34", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 8.0 installed on Mac OS", "versions": [{"version": "8.0.0", "lessThan": "8.0.34", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 8.0 installed on Windows", "versions": [{"version": "8.0.0", "lessThan": "8.0.34", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 9.0 installed on Linux", "versions": [{"version": "9.0.0", "lessThan": "9.0.0-preview.4.24266.19", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 9.0 installed on Mac OS", "versions": [{"version": "9.0.0", "lessThan": "9.0.0-preview.4.24266.19", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": ".NET 9.0 installed on Windows", "versions": [{"version": "9.0.0", "lessThan": "9.0.0-preview.4.24266.19", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2022 version 17.14", "versions": [{"version": "17.14.0", "lessThan": "17.14.45", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2026 version 18.11", "versions": [{"version": "18.11.0", "lessThan": "18.11.4", "versionType": "custom", "status": "affected"}]}, {"vendor": "Microsoft", "product": "Microsoft Visual Studio 2026 version 18.12", "versions": [{"version": "18.12.0", "lessThan": "18.12.0", "versionType": "custom", "status": "affected"}]}], "descriptions": [{"value": "Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.", "lang": "en-US"}], "problemTypes": [{"descriptions": [{"description": "CWE-407: Inefficient Algorithmic Complexity", "lang": "en-US", "type": "CWE", "cweId": "CWE-407"}]}], "providerMetadata": {"orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8", "shortName": "microsoft", "dateUpdated": "2026-11-10T23:46:50.125Z"}, "references": [{"name": "ASP.NET Core Denial of Service Vulnerability", "tags": ["vendor-advisory", "patch"], "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109478"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "baseSeverity": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C"}}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-109478", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-10T20:49:14.082894Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-10T20:50:39.980Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": ".NET 8.0 installed on Linux", "vendor": "Microsoft", "versions": [{"lessThan": "8.0.34", "status": "affected", "version": "8.0.0", "versionType": "custom"}]}, {"product": ".NET 8.0 installed on Mac OS", "vendor": "Microsoft", "versions": [{"lessThan": "8.0.34", "status": "affected", "version": "8.0.0", "versionType": "custom"}]}, {"product": ".NET 8.0 installed on Windows", "vendor": "Microsoft", "versions": [{"lessThan": "8.0.34", "status": "affected", "version": "8.0.0", "versionType": "custom"}]}, {"product": ".NET 9.0 installed on Linux", "vendor": "Microsoft", "versions": [{"lessThan": "9.0.0-preview.4.24266.19", "status": "affected", "version": "9.0.0", "versionType": "custom"}]}, {"product": ".NET 9.0 installed on Mac OS", "vendor": "Microsoft", "versions": [{"lessThan": "9.0.0-preview.4.24266.19", "status": "affected", "version": "9.0.0", "versionType": "custom"}]}, {"product": ".NET 9.0 installed on Windows", "vendor": "Microsoft", "versions": [{"lessThan": "9.0.0-preview.4.24266.19", "status": "affected", "version": "9.0.0", "versionType": "custom"}]}, {"product": "Microsoft Visual Studio 2022 version 17.14", "vendor": "Microsoft", "versions": [{"lessThan": "17.14.45", "status": "affected", "version": "17.14.0", "versionType": "custom"}]}, {"product": "Microsoft Visual Studio 2026 version 18.11", "vendor": "Microsoft", "versions": [{"lessThan": "18.11.4", "status": "affected", "version": "18.11.0", "versionType": "custom"}]}, {"product": "Microsoft Visual Studio 2026 version 18.12", "vendor": "Microsoft", "versions": [{"lessThan": "18.12.0", "status": "affected", "version": "18.12.0", "versionType": "custom"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network."}], "id": "CVE-2026-109478", "lastModified": "2026-11-11T00:17:06.280", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "[email protected]", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-109478", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-10T20:49:14.082894Z", "version": "2.0.3"}}]}, "published": "2026-11-10T19:18:17.113", "references": [{"source": "[email protected]", "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109478"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-407"}], "source": "[email protected]", "type": "Secondary"}]}

{"bugzilla": {"description": "dotnet8.0: ASP.NET Core Denial of Service Vulnerability", "id": "2568440", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2568440"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C", "status": "draft"}, "cwe": "CWE-407", "details": ["Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network."], "name": "CVE-2026-109478", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/a:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/a:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "dotnet8.0", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "dotnet8.0", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-11-10T17:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-109478\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-109478"], "threat_severity": "Important"}

{}