{"id":"CVE-2017-9785","aliases":["GHSA-mx3q-j2g2-5qxq"],"url":"https://o3.security/vulnerability/CVE-2017-9785","summary":"Deserialization of Untrusted Data in NancyFX Nancy","details":"Csrf.cs in NancyFX Nancy before 1.4.4 and 2.x before 2.0-dangermouse has Remote Code Execution via Deserialization of JSON data in a CSRF Cookie.","published":"2017-07-20T12:29:00.187Z","modified":"2026-10-20T10:49:36.764103055Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"Nancy","fixedVersion":"1.4.4"},{"ecosystem":"NuGet","name":"Nancy","fixedVersion":"2.0.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/NancyFx/Nancy/releases/tag/v1.4.4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-9785"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-20T10:49:36.764103055Z"}}