GHSA-WQ9F-QMPX-2CC8

Vulnerability from github – Published: 2026-10-20 21:31 – Updated: 2026-10-20 21:31
VLAI
Details

When built with wolfSSL, curl can successfully validate a pinned public key hash against a key the TLS peer does not possess. During the TLS handshake, wolfSSL validates the connection, but curl's subsequent re-parsing of the same certificate - tricked by a manipulated validity length field - extracts and matches a different embedded key, incorrectly authorizing the pinned public key.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-87866"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-20T21:17:20Z",
    "severity": null
  },
  "details": "When built with wolfSSL, curl can successfully validate a pinned public key\nhash against a key the TLS peer does not possess. During the TLS handshake,\nwolfSSL validates the connection, but curl\u0027s subsequent re-parsing of the same\ncertificate - tricked by a manipulated validity length field - extracts and\nmatches a different embedded key, incorrectly authorizing the pinned public\nkey.",
  "id": "GHSA-wq9f-qmpx-2cc8",
  "modified": "2026-10-20T21:31:08Z",
  "published": "2026-10-20T21:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87866"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3989514"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-87866.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-87866.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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