{"id":"CVE-2026-85790","title":"Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.","summary":"Use after free in Microsoft QUIC allows an unauthorized attacker to disclose information over a network.","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-416"],"vendor":"Microsoft","product":"Microsoft.Native.Quic.MsQuic.Schannel","affected":["Microsoft.Native.Quic.MsQuic.Schannel >= 1.9.0, <= 2.6.1"],"patched":["Microsoft.Native.Quic.MsQuic.Schannel 2.6.2"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T21:19:19.137","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85790","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85790","label":"secure@microsoft.com"},{"url":"https://github.com/dotnet/runtime/security/advisories/GHSA-2mxg-prvg-9jfg"},{"url":"https://github.com/dotnet/announcements/issues/470"},{"url":"https://github.com/dotnet/runtime/issues/135704"},{"url":"https://github.com/advisories/GHSA-2mxg-prvg-9jfg"}],"tags":["nvd","ghsa","nuget"],"aliases":["GHSA-2mxg-prvg-9jfg"],"ecosystem":"nuget","ingestedAt":"2026-10-13T19:43:29.165Z","slug":"CVE-2026-85790","body":"## Overview\n\nUse after free in Microsoft QUIC allows an unauthorized attacker to disclose information 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-2026-85790)\n\nAffected packages:\n\n- `Microsoft.Native.Quic.MsQuic.Schannel >= 1.9.0, <= 2.6.1`\n\nPatched in:\n\n- `Microsoft.Native.Quic.MsQuic.Schannel 2.6.2`\n\nSource: https://github.com/advisories/GHSA-2mxg-prvg-9jfg","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}