{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45067", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-08T18:45:10.096Z", "datePublished": "2026-07-14T17:41:53.874Z", "dateUpdated": "2026-07-14T18:15:43.658Z"}, "containers": {"cna": {"title": "Symfony: Email Header / SMTP Command Injection via CRLF in Symfony\\Component\\Mime\\Address", "problemTypes": [{"descriptions": [{"cweId": "CWE-93", "lang": "en", "description": "CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "vectorString": "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", "version": "4.0"}}], "references": [{"name": "https://github.com/symfony/symfony/security/advisories/GHSA-qpmx-3rfj-7rhv", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/symfony/symfony/security/advisories/GHSA-qpmx-3rfj-7rhv"}, {"name": "https://github.com/symfony/symfony/commit/a1c42cbe517bc146a54da7505a107ded317478fe", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/symfony/commit/a1c42cbe517bc146a54da7505a107ded317478fe"}, {"name": "https://github.com/symfony/symfony/releases/tag/v5.4.52", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/symfony/releases/tag/v5.4.52"}, {"name": "https://github.com/symfony/symfony/releases/tag/v6.4.40", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/symfony/releases/tag/v6.4.40"}, {"name": "https://github.com/symfony/symfony/releases/tag/v7.4.12", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/symfony/releases/tag/v7.4.12"}, {"name": "https://github.com/symfony/symfony/releases/tag/v8.0.12", "tags": ["x_refsource_MISC"], "url": "https://github.com/symfony/symfony/releases/tag/v8.0.12"}], "affected": [{"vendor": "symfony", "product": "symfony", "versions": [{"version": "< 5.4.52", "status": "affected"}, {"version": ">= 6.0.0-BETA1, < 6.4.40", "status": "affected"}, {"version": ">= 7.0.0-BETA1, < 7.4.12", "status": "affected"}, {"version": ">= 8.0.0-BETA1, < 8.0.12", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-14T17:41:53.874Z"}, "descriptions": [{"lang": "en", "value": "### 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 \u2014 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:<...>` / `RCPT TO:<...>` 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."}], "source": {"advisory": "GHSA-qpmx-3rfj-7rhv", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-14T18:15:37.710176Z", "id": "CVE-2026-45067", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-14T18:15:43.658Z"}}]}}

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