{
  "id": "CVE-2026-91769",
  "url": "https://spydr.io/cve/CVE-2026-91769",
  "published": "2026-09-25T21:17:24.913Z",
  "modified": "2026-09-29T21:27:41.130Z",
  "score": 4.3,
  "severity": "medium",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
  "score_source": "php.net",
  "epss": 0.00135,
  "epss_percentile": 0.02516,
  "exploited": false,
  "kev": null,
  "ssvc_exploitation": "none",
  "vendors": [
    "PHP Group"
  ],
  "products": [
    "PHP Group PHP"
  ],
  "cwes": [
    "CWE-297"
  ],
  "description": "PHP's OpenSSL stream peer verification checks the certificate's subjectAltName entries first and, whenever no entry matches, falls back to the Common Name. RFC 6125 requires the CN to be ignored once the certificate presents any service identity, so a certificate carrying a non-matching DNS SAN was still accepted when its CN matched the requested peer_name. A certificate trusted by the client for one name can therefore be used to impersonate another.",
  "status": "Awaiting Analysis",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 4.3,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://github.com/php/php-src/security/advisories/GHSA-vvx9-73fr-5jjx",
      "tags": []
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91769",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}