{"id":"CVE-2026-45070","aliases":["GHSA-vqc8-7275-q272"],"url":"https://o3.security/vulnerability/CVE-2026-45070","summary":"Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names","details":"Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\\Component\\Mime\\Header\\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derives a parameter name from untrusted input to include CRLF or other non-token bytes and inject additional headers into rendered structured mail headers such as Content-Type or Content-Disposition. This issue is reported as fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.","published":"2026-07-14T18:25:46.647Z","modified":"2026-08-12T03:51:32.387478551Z","cvss":null,"epss":{"score":0.00292,"percentile":0.21824,"asOf":"2026-08-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"symfony/mime","fixedVersion":"5.4.52"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"5.4.52"},{"ecosystem":"Packagist","name":"symfony/mime","fixedVersion":"6.4.40"},{"ecosystem":"Packagist","name":"symfony/mime","fixedVersion":"7.4.12"},{"ecosystem":"Packagist","name":"symfony/mime","fixedVersion":"8.0.12"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"6.4.40"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"7.4.12"},{"ecosystem":"Packagist","name":"symfony/symfony","fixedVersion":"8.0.12"}],"fix":{"url":"https://github.com/symfony/symfony/commit/e62ea217f8b4ca8ae922ad0f949e0c4dc1f9b613","label":"symfony/symfony@e62ea21"},"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-2026-45070.json"},{"type":"ADVISORY","url":"https://github.com/symfony/symfony/security/advisories/GHSA-vqc8-7275-q272"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45070"},{"type":"FIX","url":"https://github.com/symfony/symfony/commit/e62ea217f8b4ca8ae922ad0f949e0c4dc1f9b613"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:32.387478551Z"}}