{"action":"Upgrade System.Security.Cryptography.Xml to 8.0.5 (8.x), 9.0.21 (9.x), 10.0.13 (10.x) or 11.0.0-rc.2 (11.x) or later.","affected":[{"fixed":"10.0.13","introduced":"10.0.0"},{"fixed":"11.0.0-rc.2","introduced":"11.0.0-preview.1"},{"fixed":"8.0.5","introduced":"8.0.0"},{"fixed":"9.0.21","introduced":"9.0.0"}],"component":"System.Security.Cryptography.Xml","cve_ids":["CVE-2026-96959"],"ecosystem":"NuGet","epss":0.00969,"exploited":false,"fixed_versions":["10.0.13","11.0.0-rc.2","8.0.5","9.0.21"],"ghsa_id":"GHSA-c399-9853-6jmj","id":"tcs_01M5N8HMWYF0YG3GXCT5QA1EGT","modified_at":"2026-10-19T19:30:06.712821176Z","published_at":"2026-10-13T20:49:06Z","references":["https://osv.dev/vulnerability/GHSA-c399-9853-6jmj","https://github.com/dotnet/runtime/security/advisories/GHSA-c399-9853-6jmj","https://nvd.nist.gov/vuln/detail/CVE-2026-96959","https://github.com/dotnet/announcements/issues/489","https://github.com/dotnet/runtime/issues/135710","https://github.com/dotnet/runtime","https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96959"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-c399-9853-6jmj","url":"https://osv.dev/vulnerability/GHSA-c399-9853-6jmj"}],"summary":"Microsoft Security Advisory CVE-2026-96959 - .NET and Visual Studio Denial of Service Vulnerability"}