{"id":"CVE-2026-87862","title":"HSTS cache import drops longer-lived child","summary":"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 …","severity":"none","cwe":["CWE-201"],"vendor":"curl","product":"curl","affected":["curl >= 8.22.0 <= 8.22.0","curl >= 8.21.0 <= 8.21.0","curl >= 8.20.0 <= 8.20.0","curl >= 8.19.0 <= 8.19.0","curl >= 8.18.0 <= 8.18.0","curl >= 8.17.0 <= 8.17.0","curl >= 8.16.0 <= 8.16.0","curl >= 8.15.0 <= 8.15.0","curl >= 8.14.1 <= 8.14.1","curl >= 8.14.0 <= 8.14.0","curl >= 8.13.0 <= 8.13.0","curl >= 8.12.1 <= 8.12.1","curl >= 8.12.0 <= 8.12.0","curl >= 8.11.1 <= 8.11.1","curl >= 8.11.0 <= 8.11.0"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T20:10:37.039Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-87862","references":[{"url":"https://curl.se/docs/CVE-2026-87862.json","label":"json"},{"url":"https://curl.se/docs/CVE-2026-87862.html","label":"www"},{"url":"https://hackerone.com/reports/3972357","label":"issue"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T21:19:21.286Z","slug":"CVE-2026-87862","body":"## Overview\n\nImporting 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.\n\n## Affected\n\n- `curl >= 8.22.0 <= 8.22.0`\n- `curl >= 8.21.0 <= 8.21.0`\n- `curl >= 8.20.0 <= 8.20.0`\n- `curl >= 8.19.0 <= 8.19.0`\n- `curl >= 8.18.0 <= 8.18.0`\n- `curl >= 8.17.0 <= 8.17.0`\n- `curl >= 8.16.0 <= 8.16.0`\n- `curl >= 8.15.0 <= 8.15.0`\n- `curl >= 8.14.1 <= 8.14.1`\n- `curl >= 8.14.0 <= 8.14.0`\n- `curl >= 8.13.0 <= 8.13.0`\n- `curl >= 8.12.1 <= 8.12.1`\n- `curl >= 8.12.0 <= 8.12.0`\n- `curl >= 8.11.1 <= 8.11.1`\n- `curl >= 8.11.0 <= 8.11.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}