| Name | CVE-2026-45070 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| symfony (PTS) | bookworm, bookworm (security) | 5.4.53+dfsg-0+deb12u1 | vulnerable |
| trixie (security), trixie | 6.4.41+dfsg-0+deb13u1 | vulnerable | |
| forky | 7.4.22+dfsg-1 | fixed | |
| sid | 7.4.23+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| symfony | source | (unstable) | 7.4.22+dfsg-1 |
https://symfony.com/blog/cve-2026-45070-email-header-injection-via-non-token-characters-in-mime-parameter-names
Fixed by: https://github.com/symfony/symfony/commit/8cc149f5d7dddcb02b17f8d0d3fe9b24 (v8.1.10,v7.4.22,v6.4.49,v5.4.55)