{"id":"CVE-2026-70194","title":"Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.","summary":"Improper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-295"],"published":"2026-10-13","updated":"2026-10-14","sourceUpdated":"2026-10-14T19:17:19.530","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-70194","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70194","label":"secure@microsoft.com"},{"url":"https://github.com/dotnet/runtime/security/advisories/GHSA-fqpq-cx42-9jmm"},{"url":"https://github.com/dotnet/announcements/issues/464"},{"url":"https://github.com/dotnet/runtime/issues/135701"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-70194"},{"url":"https://github.com/advisories/GHSA-fqpq-cx42-9jmm"}],"tags":["nvd","cve.org","ghsa","nuget"],"epss":0.00486,"epssPercentile":0.41664,"ingestedAt":"2026-10-13T19:43:29.023Z","vendor":"Microsoft","product":".NET 11.0","affected":[".net_11.0 >= 11.0.0 < 11.0.0-rc.2","visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.42","visual_studio_2026_version_18.10 >= 18.10.0 < 18.10.4"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-14T18:46:03.417201Z"},"aliases":["GHSA-fqpq-cx42-9jmm"],"ecosystem":"nuget","patched":["Microsoft.NETCore.App.Runtime.linux-arm 11.0.0-rc.2","Microsoft.NETCore.App.Runtime.linux-arm64 11.0.0-rc.2","Microsoft.NETCore.App.Runtime.linux-musl-arm 11.0.0-rc.2","Microsoft.NETCore.App.Runtime.linux-musl-arm64 11.0.0-rc.2","Microsoft.NETCore.App.Runtime.linux-musl-x64 11.0.0-rc.2","Microsoft.NETCore.App.Runtime.linux-x64 11.0.0-rc.2","Microsoft.NETCore.App.Runtime.osx-arm64 11.0.0-rc.2","Microsoft.NETCore.App.Runtime.osx-x64 11.0.0-rc.2"],"slug":"CVE-2026-70194","body":"## Overview\n\nImproper certificate validation in .NET Framework allows an unauthorized attacker to bypass a security feature over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-70194)\n\nAffected packages:\n\n- `Microsoft.NETCore.App.Runtime.linux-arm >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.NETCore.App.Runtime.linux-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.NETCore.App.Runtime.linux-musl-arm >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.NETCore.App.Runtime.linux-musl-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.NETCore.App.Runtime.linux-musl-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.NETCore.App.Runtime.linux-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.NETCore.App.Runtime.osx-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.NETCore.App.Runtime.osx-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n\nPatched in:\n\n- `Microsoft.NETCore.App.Runtime.linux-arm 11.0.0-rc.2`\n- `Microsoft.NETCore.App.Runtime.linux-arm64 11.0.0-rc.2`\n- `Microsoft.NETCore.App.Runtime.linux-musl-arm 11.0.0-rc.2`\n- `Microsoft.NETCore.App.Runtime.linux-musl-arm64 11.0.0-rc.2`\n- `Microsoft.NETCore.App.Runtime.linux-musl-x64 11.0.0-rc.2`\n- `Microsoft.NETCore.App.Runtime.linux-x64 11.0.0-rc.2`\n- `Microsoft.NETCore.App.Runtime.osx-arm64 11.0.0-rc.2`\n- `Microsoft.NETCore.App.Runtime.osx-x64 11.0.0-rc.2`\n\nSource: https://github.com/advisories/GHSA-fqpq-cx42-9jmm","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}