{
    "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 — 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"
                }
            }
        ]
    }
}