GHSA-g3rh-rrhp-jhh9
Symfony has an incorrect response from Validator when input ends with `\n`
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Packagist | symfony/symfony | < 5.4.43 | 5.4.43 |
| Packagist | symfony/symfony | >= 6.0.0, < 6.4.11 | 6.4.11 |
| Packagist | symfony/symfony | >= 7.0.0, < 7.1.4 | 7.1.4 |
| Packagist | symfony/validator | < 5.4.43 | 5.4.43 |
| Packagist | symfony/validator | >= 6.0.0, < 6.4.11 | 6.4.11 |
| Packagist | symfony/validator | >= 7.0.0, < 7.1.4 | 7.1.4 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Description
It is possible to trick a `Validator` configured with a regular expression using the `$` metacharacters, with an input ending with `\n`.
### Resolution
Symfony now uses the `D` regex modifier to match the entire input.
The patch for this issue is available [here](https://github.com/symfony/symfony/commit/7d1032bbead9a4229b32fa6ebca32681c80cb76f) for branch 5.4.
### Credits
We would like to thank Offscript for reporting the issue and Alexandre Daubois for providing the fix.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/symfony/symfony/security/advisories/GHSA-g3rh-rrhp-jhh9
- https://nvd.nist.gov/vuln/detail/CVE-2024-50343
- https://github.com/symfony/symfony/commit/7d1032bbead9a4229b32fa6ebca32681c80cb76f
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2024-50343.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/validator/CVE-2024-50343.yaml
- https://github.com/symfony/symfony
- https://lists.debian.org/debian-lts-announce/2025/05/msg00051.html
- https://symfony.com/cve-2024-50343