{"schemaVersion":3,"id":"CVE-2026-70194","aliases":["GHSA-fqpq-cx42-9jmm"],"status":"published","duplicateOf":null,"title":null,"description":"Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.","dates":{"published":"2026-10-13T19:00:26.934Z","modified":"2026-10-19T19:35:53.379Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Nuget","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","exploitability":10,"impact":4.2,"computed":true}]},"epss":{"probability":0.00429,"percentile":0.35748,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-14T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00429,"percentile":0.35748}],"last30":[{"date":"2026-10-14T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00429,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00429,"percentile":0.35748}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-295","name":"Improper Certificate Validation","description":"The product does not validate, or incorrectly validates, a certificate.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/295.html"}],"affected":[{"vendor":"microsoft","product":"microsoft visual studio 2022 version 17.14","name":"Microsoft Visual Studio 2022 version 17.14","label":"microsoft visual studio 2022 version 17.14","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 17.14.0, < 17.14.42","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 17.14.0, < 17.14.42","eol":null,"hubHref":"/vendor/microsoft/microsoft_visual_studio_2022_version_1714"},{"vendor":"microsoft","product":"microsoft visual studio 2026 version 18.10","name":"Microsoft Visual Studio 2026 version 18.10","label":"microsoft visual studio 2026 version 18.10","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 18.10.0, < 18.10.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 18.10.0, < 18.10.4","eol":null,"hubHref":"/vendor/microsoft/microsoft_visual_studio_2026_version_1810"},{"vendor":"microsoft","product":".net 11.0","name":".NET 11.0","label":".net 11.0","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 11.0.0, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0, < 11.0.0-rc.2","eol":null,"hubHref":"/vendor/microsoft/net_110"},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.linux-arm","name":"Microsoft.NETCore.App.Runtime.linux-arm","label":"Microsoft.NETCore.App.Runtime.linux-arm","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-arm","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.linux-arm64","name":"Microsoft.NETCore.App.Runtime.linux-arm64","label":"Microsoft.NETCore.App.Runtime.linux-arm64","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-arm64","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.linux-musl-arm","name":"Microsoft.NETCore.App.Runtime.linux-musl-arm","label":"Microsoft.NETCore.App.Runtime.linux-musl-arm","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.linux-musl-arm64","name":"Microsoft.NETCore.App.Runtime.linux-musl-arm64","label":"Microsoft.NETCore.App.Runtime.linux-musl-arm64","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-musl-arm64","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.linux-musl-x64","name":"Microsoft.NETCore.App.Runtime.linux-musl-x64","label":"Microsoft.NETCore.App.Runtime.linux-musl-x64","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-musl-x64","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.linux-x64","name":"Microsoft.NETCore.App.Runtime.linux-x64","label":"Microsoft.NETCore.App.Runtime.linux-x64","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.linux-x64","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.osx-arm64","name":"Microsoft.NETCore.App.Runtime.osx-arm64","label":"Microsoft.NETCore.App.Runtime.osx-arm64","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.osx-arm64","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null},{"vendor":"NuGet","product":"Microsoft.NETCore.App.Runtime.osx-x64","name":"Microsoft.NETCore.App.Runtime.osx-x64","label":"Microsoft.NETCore.App.Runtime.osx-x64","ecosystem":"NuGet","cpePart":null,"purl":"pkg:nuget/Microsoft.NETCore.App.Runtime.osx-x64","purlType":"nuget","versions":[{"text":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 11.0.0-preview.1, < 11.0.0-rc.2","eol":null,"hubHref":null}],"affectedCount":11,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70194","label":"msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70194","hostname":"msrc.microsoft.com","tags":["Vendor Advisory","Patch","WEB"]},{"url":"https://github.com/dotnet/runtime/security/advisories/GHSA-fqpq-cx42-9jmm","label":"github.com/dotnet/runtime/security/advisories/GHSA-fqpq-cx42-9jmm","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/dotnet/announcements/issues/464","label":"github.com/dotnet/announcements/issues/464","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/dotnet/runtime/issues/135701","label":"github.com/dotnet/runtime/issues/135701","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/dotnet/runtime","label":"github.com/dotnet/runtime","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70194","label":"nvd.nist.gov/vuln/detail/CVE-2026-70194","hostname":"nvd.nist.gov","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-13T19:00:26.934Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-19T19:35:53.379Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T23:09:33.882Z","stale":false,"partial":false}}