{"id":"CVE-2026-45070","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-45070","generatedAt":"2026-10-28T03:42:43.699Z","title":"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…","description":"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":"2026-07-14T19:17:06.000Z","lastModified":"2026-07-16T15:16:31.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-93"],"affected":["sensiolabs/symfony"],"epss":{"score":0.0039,"percentile":0.33002,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/symfony/symfony/commit/e62ea217f8b4ca8ae922ad0f949e0c4dc1f9b613","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/symfony/symfony/releases/tag/v5.4.52","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/symfony/symfony/releases/tag/v6.4.40","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/symfony/symfony/releases/tag/v7.4.12","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/symfony/symfony/releases/tag/v8.0.12","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/symfony/symfony/security/advisories/GHSA-vqc8-7275-q272","tags":["Patch","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45070","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}