medium6.5
CVE-2026-45070
Symfony is a PHP framework for web and console applications and a set of reusable PHP components.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | symfony/mime | < 5.4.52 | 5.4.52 |
| composer | symfony/symfony | < 5.4.52 | 5.4.52 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Sensiolabs | Symfony | before 5.4.52 from 6.0.0 before 6.4.40 from 7.0.0 before 7.4.12 from 8.0.0 before 8.0.12 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-vqc8-7275-q272
- https://github.com/symfony/symfony/security/advisories/GHSA-vqc8-7275-q272
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mime/CVE-2026-45070.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45070.yaml
- https://symfony.com/cve-2026-45070
- https://github.com/symfony/symfony/commit/e62ea217f8b4ca8ae922ad0f949e0c4dc1f9b613
- https://github.com/symfony/symfony/releases/tag/v5.4.52
- https://github.com/symfony/symfony/releases/tag/v6.4.40
- https://github.com/symfony/symfony/releases/tag/v7.4.12
- https://github.com/symfony/symfony/releases/tag/v8.0.12