{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.4.52"
              },
              {
                "introduced": "6.0.0-BETA1"
              },
              {
                "fixed": "6.4.40"
              },
              {
                "introduced": "7.0.0-BETA1"
              },
              {
                "fixed": "7.4.12"
              },
              {
                "introduced": "8.0.0-BETA1"
              },
              {
                "fixed": "8.0.12"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "eabc5f9ed7831fe6de8d609c5ebc29aed1f8ef8f"
            },
            {
              "introduced": "67778bf0d384584bc59bb618a91ef6b08e9153c6"
            },
            {
              "fixed": "95a951788e30c45356278f4e4472cbbf552d0eb9"
            },
            {
              "introduced": "ed57652df42aef294f411ef53dcfa5d6b7da2f90"
            },
            {
              "fixed": "275f5cbccbcc50205206f05e599c4f57009aadb8"
            },
            {
              "introduced": "eca48f1c4682ee0c55a2d320ca25d8292ed48f75"
            },
            {
              "fixed": "06d3b2c9a8aeb5d8493738cc51e24f6a1215827c"
            }
          ],
          "repo": "https://github.com/symfony/symfony",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qpmx-3rfj-7rhv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-93"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45067.json"
  },
  "details": "### Description\n\n`Symfony\\Component\\Mime\\Address` is the value-object every Symfony Mailer address (to/cc/bcc/from/reply-to) flows through; its constructor is documented as validating the address and throwing on invalid input, so developers treat it as a security boundary.\n\nThe constructor accepts email addresses whose local-part (the part before `@`) is an RFC-5322 *quoted string* containing raw `\\r\\n` bytes — e.g. `\"x\\r\\nBcc: attacker@evil\"@example.com`. The stored address is later emitted verbatim into (1) the rendered message headers and (2) `SmtpTransport`'s `MAIL FROM:\u003c...\u003e` / `RCPT TO:\u003c...\u003e` protocol lines, turning the embedded CRLF into a new mail header and/or a new SMTP command.\n\n### Resolution\n\nThe `Address` constructor now rejects addresses containing line breaks.\n\nThe patch for this issue is available [here](https://github.com/symfony/symfony/commit/dc2dbd29211eb4ddc451373fa1374fb926e94604) for branch 5.4.\n\n### Credits\n\nWe would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.",
  "id": "CVE-2026-45067",
  "modified": "2026-07-15T01:49:06.044682327Z",
  "published": "2026-07-14T17:41:53.874Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45067.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/symfony/symfony/commit/a1c42cbe517bc146a54da7505a107ded317478fe"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v5.4.52"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v6.4.40"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v7.4.12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/symfony/symfony/releases/tag/v8.0.12"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/symfony/symfony/security/advisories/GHSA-qpmx-3rfj-7rhv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45067"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Symfony: Email Header / SMTP Command Injection via CRLF in Symfony\\Component\\Mime\\Address"
}