{"schemaVersion":3,"id":"CVE-2026-87862","aliases":["DEBIAN-CVE-2026-87862","UBUNTU-CVE-2026-87862"],"status":"published","duplicateOf":null,"title":null,"description":"Importing a `includeSubDomains` parent HSTS entry before a longer-lived child\nentry, silently drops the child. Consequently, when the parent expires, the\nchild's valid HSTS policy is lost, causing curl to issue unencrypted HTTP\nrequests rather than upgrading to HTTPS.","dates":{"published":"2026-10-20T20:10:37.039Z","modified":"2026-10-20T20:10:37.039Z","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":"8.22.0","noFixRecorded":false,"fixedIn":null},{"text":"8.21.0","noFixRecorded":false,"fixedIn":null},{"text":"8.20.0","noFixRecorded":false,"fixedIn":null},{"text":"8.19.0","noFixRecorded":false,"fixedIn":null},{"text":"8.18.0","noFixRecorded":false,"fixedIn":null},{"text":"8.17.0","noFixRecorded":false,"fixedIn":null},{"text":"8.16.0","noFixRecorded":false,"fixedIn":null},{"text":"8.15.0","noFixRecorded":false,"fixedIn":null},{"text":"8.14.1","noFixRecorded":false,"fixedIn":null},{"text":"8.14.0","noFixRecorded":false,"fixedIn":null},{"text":"8.13.0","noFixRecorded":false,"fixedIn":null},{"text":"8.12.1","noFixRecorded":false,"fixedIn":null},{"text":"8.12.0","noFixRecorded":false,"fixedIn":null},{"text":"8.11.1","noFixRecorded":false,"fixedIn":null},{"text":"8.11.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"8.22.0 | 8.21.0 | 8.20.0 | 8.19.0 | 8.18.0 | 8.17.0 | 8.16.0 | 8.15.0 | 8.14.1 | 8.14.0 | 8.13.0 | 8.12.1 | 8.12.0 | 8.11.1 | 8.11.0","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":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"curl","name":"curl","label":"curl","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/curl","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 7.81.0-1ubuntu1.30","noFixRecorded":false,"fixedIn":null},{"text":"< 8.5.0-2ubuntu10.16","noFixRecorded":false,"fixedIn":null},{"text":"< 8.20.0-2ubuntu11.1","noFixRecorded":false,"fixedIn":null},{"text":"< 8.18.0-1ubuntu2.8","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 7.81.0-1ubuntu1.30 | < 8.5.0-2ubuntu10.16 | < 8.20.0-2ubuntu11.1 | < 8.18.0-1ubuntu2.8","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://security-tracker.debian.org/tracker/CVE-2026-87862","label":"security-tracker.debian.org/tracker/CVE-2026-87862","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-87862","label":"ubuntu.com/security/CVE-2026-87862","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-87862","label":"www.cve.org/CVERecord?id=CVE-2026-87862","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://curl.se/docs/CVE-2026-87862.html","label":"curl.se/docs/CVE-2026-87862.html","hostname":"curl.se","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8927-1","label":"ubuntu.com/security/notices/USN-8927-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-8927-2","label":"ubuntu.com/security/notices/USN-8927-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://curl.se/docs/CVE-2026-87862.json","label":"curl.se/docs/CVE-2026-87862.json","hostname":"curl.se","tags":[]},{"url":"https://hackerone.com/reports/3972357","label":"hackerone.com/reports/3972357","hostname":"hackerone.com","tags":[]},{"url":"https://ubuntu.com/security/notices/USN-8932-1","label":"ubuntu.com/security/notices/USN-8932-1","hostname":"ubuntu.com","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["CVE-2026-92392","MGASA-2026-0515","OPENSUSE-SU-2026:12150-1","USN-8927-1","USN-8927-2","USN-8932-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:12150-1","USN-8927-1","USN-8927-2","USN-8932-1"]},"timeline":[{"kind":"published","date":"2026-10-20T20:10:37.039Z","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":"2026-10-21T12:22:36.898Z","stale":false,"partial":false}}