CVE-2026-45070

published 2026-07-14

CVE-2026-45070: 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…

Priority P3 38 medium 6.5 CVSS 3.1

AV N AC L PR N UI N S U C L I L A N

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.

Affected

20 ranges

Vendor	Product	Version range	Fixed in
sensiolabs	symfony	< 5.4.52	5.4.52
sensiolabs	symfony	>= 6.0.0 < 6.4.40	6.4.40
sensiolabs	symfony	>= 7.0.0 < 7.4.12	7.4.12
sensiolabs	symfony	>= 8.0.0 < 8.0.12	8.0.12
symfony	mime	< 5.4.52	5.4.52
symfony	mime	—	—
symfony	mime	—	—
symfony	mime	—	—
symfony	mime	>= 0 < 5.4.52	5.4.52
symfony	mime	>= 6.0.0 < 6.4.40	6.4.40
symfony	mime	>= 7.0.0 < 7.4.12	7.4.12
symfony	mime	>= 8.0.0 < 8.0.12	8.0.12
symfony	symfony	< 5.4.52	5.4.52
symfony	symfony	—	—
symfony	symfony	—	—
symfony	symfony	—	—
symfony	symfony	>= 0 < 5.4.52	5.4.52
symfony	symfony	>= 6.0.0 < 6.4.40	6.4.40
symfony	symfony	>= 7.0.0 < 7.4.12	7.4.12
symfony	symfony	>= 8.0.0 < 8.0.12	8.0.12

CVSS provenance

nvd v3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

nvd v4.0 6.3 MEDIUM 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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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CWE-93