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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 Reserved 2026-05-08 | Published 2026-07-14 | Updated 2026-07-14 | Assigner GitHub_M




MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')

Product status

< 5.4.52
affected

>= 6.0.0-BETA1, < 6.4.40
affected

>= 7.0.0-BETA1, < 7.4.12
affected

>= 8.0.0-BETA1, < 8.0.12
affected

< 5.4.52
affected

>= 6.0.0-BETA1, < 6.4.40
affected

>= 7.0.0-BETA1, < 7.4.12
affected

>= 8.0.0-BETA1, < 8.0.12
affected

References

github.com/...ymfony/security/advisories/GHSA-vqc8-7275-q272

github.com/...ommit/e62ea217f8b4ca8ae922ad0f949e0c4dc1f9b613

github.com/symfony/symfony/releases/tag/v5.4.52

github.com/symfony/symfony/releases/tag/v6.4.40

github.com/symfony/symfony/releases/tag/v7.4.12

github.com/symfony/symfony/releases/tag/v8.0.12

cve.org (CVE-2026-45070)

nvd.nist.gov (CVE-2026-45070)

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