{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-23419",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-23419",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-05T17:31:07.316Z",
    "updatedAt": "2026-01-23T20:09:28.384Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "TLS Session Resumption Vulnerability",
      "summary": "When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. This vulnerability arises when  TLS Session Tickets https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_ticket_key  are used and/or the  SSL session cache https://nginx.org/en/docs/http/ngx_http_ssl_module.html#ssl_session_cache  are used in the default server and the default server is performing client certificate authentication.  \n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
      "affected": [
        {
          "vendor": "F5",
          "product": "NGINX Open Source",
          "defaultStatus": "unknown",
          "versions": [
            {
              "version": "1.11.4",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "*",
              "changes": [
                {
                  "at": "1.27.4",
                  "status": "unaffected"
                },
                {
                  "at": "1.26.3",
                  "status": "unaffected"
                }
              ]
            }
          ]
        },
        {
          "vendor": "F5",
          "product": "NGINX Plus",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "R17",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "*",
              "changes": [
                {
                  "at": "R32 P2",
                  "status": "unaffected"
                },
                {
                  "at": "R33 P2",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}