{"id":"CVE-2026-45067","summary":"Symfony: Email Header / SMTP Command Injection via CRLF in Symfony\\Component\\Mime\\Address","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.","aliases":["GHSA-qpmx-3rfj-7rhv"],"modified":"2026-07-16T03:49:19.397128271Z","published":"2026-07-14T17:41:53.874Z","related":["CGA-pwqr-h8xr-fj4w"],"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"},"references":[{"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/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45067.json"},{"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"},{"type":"FIX","url":"https://github.com/symfony/symfony/commit/a1c42cbe517bc146a54da7505a107ded317478fe"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/symfony/symfony","events":[{"introduced":"0"},{"introduced":"67778bf0d384584bc59bb618a91ef6b08e9153c6"},{"introduced":"ed57652df42aef294f411ef53dcfa5d6b7da2f90"},{"introduced":"eca48f1c4682ee0c55a2d320ca25d8292ed48f75"},{"fixed":"eabc5f9ed7831fe6de8d609c5ebc29aed1f8ef8f"},{"fixed":"95a951788e30c45356278f4e4472cbbf552d0eb9"},{"fixed":"275f5cbccbcc50205206f05e599c4f57009aadb8"},{"fixed":"06d3b2c9a8aeb5d8493738cc51e24f6a1215827c"},{"fixed":"a1c42cbe517bc146a54da7505a107ded317478fe"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"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"}]}}],"versions":["v5.4.51","v8.0.11","v7.4.11","v6.4.39","v6.4.38","v8.0.10","v7.4.10","v8.0.9","v7.4.9","v6.4.37","v8.0.8","v7.4.8","v6.4.36","v8.0.7","v7.4.7","v6.4.35","v8.0.6","v7.4.6","v6.4.34","v8.0.5","v7.4.5","v6.4.33","v8.0.4","v7.4.4","v6.4.32","v8.0.3","v7.4.3","v6.4.31","v5.4.50","v8.0.2","v7.4.2","v8.0.1","v7.4.1","v6.4.30","v7.4.0","v8.0.0","v7.4.0-RC3","v8.0.0-RC3","v8.0.0-RC2","v7.4.0-RC2","v8.0.0-RC1","v7.4.0-RC1","v6.4.29","v5.4.49","v6.4.28","v8.0.0-BETA2","v7.4.0-BETA2","v6.4.27","v8.0.0-BETA1","v7.4.0-BETA1","v6.4.26","v6.4.25","v6.4.24","v6.4.23","v6.4.22","v7.3.0-RC1","v7.3.0-BETA2","v7.3.0-BETA1","v6.4.21","v6.4.20","v6.4.19","v6.4.18","v6.4.17","v6.4.16","v5.4.48","v7.2.0-RC1","v6.4.15","v5.4.47","v7.2.0-BETA2","v6.4.14","v5.4.46","v7.2.0-BETA1","v6.4.13","v5.4.45","v6.4.12","v5.4.44","v6.4.11","v5.4.43","v6.4.10","v5.4.42","v6.4.9","v5.4.41","v6.4.8","v5.4.40","v7.1.0-RC1","v7.1.0-BETA1","v6.4.7","v5.4.39","v6.4.6","v5.4.38","v6.4.5","v5.4.37","v6.4.4","v5.4.36","v6.4.3","v5.4.35","v6.4.2","v5.4.34","v6.4.1","v5.4.33","v6.4.0","v5.4.32","v6.4.0-RC2","v7.0.0-RC1","v6.4.0-RC1","v7.0.0-BETA3","v6.4.0-BETA3","v5.4.31","v7.0.0-BETA2","v6.4.0-BETA2","v5.4.30","v7.0.0-BETA1","v6.4.0-BETA1","v5.4.29","v5.4.28","v5.4.27","v5.4.26","v5.4.25","v5.4.24","v6.3.0-RC1","v6.3.0-BETA3","v6.3.0-BETA2","v6.3.0-BETA1","v5.4.23","v5.4.22","v5.4.21","v5.4.20","v5.4.19","v5.4.18","v5.4.17","v5.4.16","v6.2.0-BETA3","v6.2.0-BETA2","v5.4.15","v6.2.0-BETA1","v5.4.14","v5.4.13","v5.4.12","v5.4.11","v5.4.10","v5.4.9","v6.1.0-RC1","v6.1.0-BETA2","v5.4.8","v6.1.0-BETA1","v5.4.7","v5.4.6","v5.4.5","v5.4.3","v5.4.4","v5.4.2","v5.4.1","v5.4.0","v6.0.0-RC1","v5.4.0-RC1","v6.0.0-BETA3","v5.4.0-BETA3","v6.0.0-BETA2","v5.4.0-BETA2","v6.0.0-BETA1","v5.4.0-BETA1","v5.3.0-BETA4","v5.3.0-BETA3","v5.3.0-BETA2","v5.3.0-BETA1","v5.2.0-BETA3","v5.2.0-BETA2","v5.2.0-BETA1","v5.1.0-BETA1","v5.0.0-RC1","v5.0.0-BETA2","v5.0.0-BETA1","v4.3.0-BETA1","v4.2.0-BETA2","v4.2.0-BETA1","v4.0.0-BETA4","v4.0.0-BETA3","v4.0.0-BETA2","v4.0.0-BETA1","v3.3.0-BETA1","v3.2.0-RC1","v3.2.0-BETA1","v3.0.0","v3.0.0-BETA1","v2.6.0-BETA1","v2.5.0-BETA1","v2.5.0-BETA2","v2.4.0-BETA2","v2.4.0-BETA1","v2.3.0-BETA2","v2.3.0-BETA1","v2.2.0-BETA2","v2.2.0-BETA1","v2.1.0","v2.1.0-RC2","v2.1.0-RC1","v2.1.0-BETA4","v2.1.0-BETA3","v2.1.0-BETA2","v2.1.0-BETA1","v2.0.0","v2.0.0-RC6","v2.0.0-RC5","v2.0.0-RC4","v2.0.0-RC3","v2.0.0-RC2","v2.0.0-RC1","v2.0.0BETA5","v2.0.0BETA4","v2.0.0BETA3","v2.0.0BETA2","v2.0.0BETA1","vPR9","vPR8","v2.0.0PR8","vPR6","vPR5","vPR4","vPR3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45067.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","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"}]}