Medium severity6.5NVD Advisory· Published Jul 14, 2026· Updated Jul 16, 2026
CVE-2026-45070
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
symfony/mimePackagist | < 5.4.52 | 5.4.52 |
symfony/symfonyPackagist | < 5.4.52 | 5.4.52 |
symfony/mimePackagist | >= 6.0.0, < 6.4.40 | 6.4.40 |
symfony/mimePackagist | >= 7.0.0, < 7.4.12 | 7.4.12 |
symfony/mimePackagist | >= 8.0.0, < 8.0.12 | 8.0.12 |
symfony/symfonyPackagist | >= 6.0.0, < 6.4.40 | 6.4.40 |
symfony/symfonyPackagist | >= 7.0.0, < 7.4.12 | 7.4.12 |
symfony/symfonyPackagist | >= 8.0.0, < 8.0.12 | 8.0.12 |
Affected products
6- Range: <5.4.52, <6.4.40, <7.4.12, <8.0.12
- Range: <5.4.52, <6.4.40, <7.4.12, <8.0.12
- osv-coords4 versionspkg:apk/chainguard/nextcloud-server-32pkg:apk/chainguard/nextcloud-server-33pkg:apk/wolfi/nextcloud-server-32pkg:apk/wolfi/nextcloud-server-33
< 32.0.11-r1+ 3 more
- (no CPE)range: < 32.0.11-r1
- (no CPE)range: < 33.0.5-r2
- (no CPE)range: < 32.0.11-r1
- (no CPE)range: < 33.0.5-r2
Patches
Vulnerability mechanics
References
10- github.com/symfony/symfony/commit/e62ea217f8b4ca8ae922ad0f949e0c4dc1f9b613nvdPatch
- github.com/symfony/symfony/security/advisories/GHSA-vqc8-7275-q272nvdPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-vqc8-7275-q272ghsaADVISORY
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mime/CVE-2026-45070.yamlghsaWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45070.yamlghsaWEB
- github.com/symfony/symfony/releases/tag/v5.4.52nvdProductRelease Notes
- github.com/symfony/symfony/releases/tag/v6.4.40nvdProductRelease Notes
- github.com/symfony/symfony/releases/tag/v7.4.12nvdProductRelease Notes
- github.com/symfony/symfony/releases/tag/v8.0.12nvdProductRelease Notes
- symfony.com/cve-2026-45070ghsaWEB
News mentions
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