{
  "schema_version": "1.5.0",
  "id": "CURL-CVE-2026-82208",
  "aliases": [
    "CVE-2026-82208"
  ],
  "summary": "wolfSSL CA-cache hit overrides callback",
  "modified": "2026-08-28T10:32:55.00Z",
  "database_specific": {
    "package": "curl",
    "affects": "lib",
    "URL": "https://curl.se/docs/CVE-2026-82208.json",
    "www": "https://curl.se/docs/CVE-2026-82208.html",
    "issue": "https://hackerone.com/reports/3973090",
    "CWE": {
      "id": "CWE-295",
      "desc": "Improper Certificate Validation"
    },
    "last_affected": "8.21.0",
    "severity": "Low"
  },
  "published": "2026-09-02T08:00:00.00Z",
  "affected": [
    {
      "ranges": [
        {
           "type": "SEMVER",
           "events": [
             {"introduced": "8.9.1"},
             {"fixed": "8.22.0"}
           ]
        },
        {
           "type": "GIT",
           "repo": "https://github.com/curl/curl.git",
           "events": [
             {"introduced": "0f2876b2c33f6784a27b6f7345bd8cd95b46352a"},
             {"fixed": "ed0338befd1d865a8ea1fbaa90013a096dedd07a"}
           ]
        }
      ],
      "versions": [
        "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", 
        "8.10.1", "8.10.0", "8.9.1"
      ]
    }
  ],
  "credits": [
    {
      "name": "Stanislav Fort (Aisle Research)",
      "type": "FINDER"
    },
    {
      "name": "Stefan Eissing",
      "type": "REMEDIATION_DEVELOPER"
    }
  ],
  "details": "With the wolfSSL backend, when CA caching is enabled and an\n`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can\nsilently reinstall the cached store after the callback returns. A certificate\ntrusted by the cached store but rejected by the callback-selected store is\nthen incorrectly accepted."
}