Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sensiolabs | Symfony | < 5.4.53 |
Related Weaknesses (CWE)
References
- https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990bPatch
- https://github.com/symfony/symfony/releases/tag/v5.4.53ProductRelease Notes
- https://github.com/symfony/symfony/releases/tag/v6.4.41ProductRelease Notes
- https://github.com/symfony/symfony/releases/tag/v7.4.13ProductRelease Notes
- https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39hPatchVendor Advisory
FAQ
What is CVE-2026-48784?
CVE-2026-48784 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 encod...
How severe is CVE-2026-48784?
CVE-2026-48784 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48784?
Check the references section above for vendor advisories and patch information. Affected products include: Sensiolabs Symfony.