{
  "schema_version": "1.5.0",
  "id": "CURL-CVE-2026-87862",
  "aliases": [
    "CVE-2026-87862"
  ],
  "summary": "HSTS cache import drops longer-lived child",
  "modified": "2026-09-17T12:57:32.00Z",
  "database_specific": {
    "package": "curl",
    "affects": "both",
    "URL": "https://curl.se/docs/CVE-2026-87862.json",
    "www": "https://curl.se/docs/CVE-2026-87862.html",
    "issue": "https://hackerone.com/reports/3972357",
    "CWE": {
      "id": "CWE-201",
      "desc": "Information Exposure Through Sent Data"
    },
    "last_affected": "8.22.0",
    "severity": "Low"
  },
  "published": "2026-10-14T08:00:00.00Z",
  "affected": [
    {
      "ranges": [
        {
           "type": "SEMVER",
           "events": [
             {"introduced": "8.11.0"},
             {"fixed": "8.14.3"},
             {"introduced": "8.15.0"},
             {"fixed": "8.16.2"},
             {"introduced": "8.17.0"},
             {"fixed": "8.20.2"},
             {"introduced": "8.21.0"},
             {"fixed": "8.23.0"}
           ]
        },
        {
           "type": "GIT",
           "repo": "https://github.com/curl/curl.git",
           "events": [
             {"introduced": "a94973805df96269bf3f3bf0a20ccb9887313316"},
             {"fixed": "a1614c3bcf1593eb524b37792124357d97a5429c"}
           ]
        }
      ],
      "versions": [
        "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"
      ]
    }
  ],
  "credits": [
    {
      "name": "Stanislav Fort (Aisle Research)",
      "type": "FINDER"
    },
    {
      "name": "Daniel Stenberg",
      "type": "REMEDIATION_DEVELOPER"
    }
  ],
  "details": "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."
}