CVE-2026-48784
Fixed in a distro release EPSS <1%CVSS 5.1
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, UrlGenerator::doGenerate() used strtr() dot-segment encoding that skipped every other chained ../ or ./ segment, allowing attacker-controlled route parameters to generate URLs that collapse to a different path under RFC 3986 normalization. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.
Products: symfony, symfony routing
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Packagist | symfony/routing | 5.4.53 |
| Packagist | symfony/routing | 6.4.41 |
| Packagist | symfony/routing | 7.4.13 |
| Packagist | symfony/routing | 8.0.13 |
| Packagist | symfony/symfony | 5.4.53 |
| Packagist | symfony/symfony | 6.4.41 |
| Packagist | symfony/symfony | 7.4.13 |
| Packagist | symfony/symfony | 8.0.13 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | nextcloud-server-31 | no fix |
| Debian 12 | symfony | 5.4.53+dfsg-0+deb12u1 |
| Debian 13 | symfony | 6.4.41+dfsg-0+deb13u1 |
| Debian 14 | symfony | 7.4.13+dfsg-1 |
| Ubuntu 16.04 LTS | symfony | no fix |
| Ubuntu 25.10 | symfony | no fix |
| Ubuntu 26.04 LTS | symfony | no fix |
| Ubuntu 26.10 | symfony | no fix |
| Ubuntu Pro 18.04 LTS | symfony | no fix |
| Ubuntu Pro 20.04 LTS | symfony | no fix |
| Ubuntu Pro 22.04 LTS | symfony | no fix |
| Ubuntu Pro 24.04 LTS | symfony | no fix |