critical9.1
CVE-2026-45063
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, X509Authenticator extracts the user identifier from $_SERVER['SSL_CLIENT_S_DN'] with an unanchored regex that matches emailAddress= anywhere in the distinguished name, allowing an attacker with a trusted certificate containing emailAddress=victim inside another RDN value such as CN to authenticate as the victim. This issue is 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/security-http | < 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-ph86-p8f6-f9r2
- https://github.com/symfony/symfony/security/advisories/GHSA-ph86-p8f6-f9r2
- https://github.com/symfony/symfony/commit/ccb3f724c7ff55670a6fe3521c7bf1514cceb478
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2026-45063.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45063.yaml
- https://symfony.com/cve-2026-45063
- https://github.com/symfony/symfony/commit/59ef484029601a7af06f5e06c6ed921fdcea5a0d
- 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