{"schemaVersion":3,"id":"CVE-2026-86411","aliases":["DEBIAN-CVE-2026-86411"],"status":"published","duplicateOf":null,"title":null,"description":"An `ftp://` transfer configured with `CURLUSESSL_NONE` can reuse a pooled FTP\ncontrol connection that a previous easy handle upgraded with `STARTTLS` and\nauthenticated using a client certificate. The second handle performs neither a\nnew TLS handshake nor a new FTP login, so the server continues to authorize it\nunder the first handle's certificate identity.","dates":{"published":"2026-10-20T20:02:03.431Z","modified":"2026-10-20T20:02:03.431Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"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":[],"affected":[{"vendor":"curl","product":"curl","name":"curl","label":"curl","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"8.21.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"8.21.0","eol":null,"hubHref":"/vendor/curl/curl"},{"vendor":"debian","product":"curl","name":"curl","label":"curl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/curl","purlType":"deb","versions":[{"text":"< 8.22.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 8.22.0-1","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://security-tracker.debian.org/tracker/CVE-2026-86411","label":"security-tracker.debian.org/tracker/CVE-2026-86411","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://curl.se/docs/CVE-2026-86411.json","label":"curl.se/docs/CVE-2026-86411.json","hostname":"curl.se","tags":[]},{"url":"https://curl.se/docs/CVE-2026-86411.html","label":"curl.se/docs/CVE-2026-86411.html","hostname":"curl.se","tags":[]},{"url":"https://hackerone.com/reports/3973190","label":"hackerone.com/reports/3973190","hostname":"hackerone.com","tags":[]}],"lineage":{"upstream":[],"downstream":["CVE-2026-92392","MGASA-2026-0515","OPENSUSE-SU-2026:12150-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:12150-1"]},"timeline":[{"kind":"published","date":"2026-10-20T20:02:03.431Z","label":"Published","detail":"Vulnerability first disclosed.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T12:49:59.838Z","stale":false,"partial":false}}