Medium severity6.1OSV Advisory· Published Jul 14, 2026· Updated Jul 15, 2026
CVE-2026-48784
CVE-2026-48784
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.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
symfony/routingPackagist | < 5.4.53 | 5.4.53 |
symfony/routingPackagist | >= 6.0.0, < 6.4.41 | 6.4.41 |
symfony/routingPackagist | >= 7.0.0, < 7.4.13 | 7.4.13 |
symfony/routingPackagist | >= 8.0.0, < 8.0.13 | 8.0.13 |
symfony/symfonyPackagist | < 5.4.53 | 5.4.53 |
symfony/symfonyPackagist | >= 6.0.0, < 6.4.41 | 6.4.41 |
symfony/symfonyPackagist | >= 7.0.0, < 7.4.13 | 7.4.13 |
symfony/symfonyPackagist | >= 8.0.0, < 8.0.13 | 8.0.13 |
Affected products
3v5.4.52, v7.4.12, v6.4.40, …+ 2 more
- (no CPE)range: v5.4.52, v7.4.12, v6.4.40, …
- (no CPE)range: <5.4.53, <6.4.41, <7.4.13, <8.0.13
- cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*range: <5.4.53
Patches
Vulnerability mechanics
References
9- github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1dnvdPatchWEB
- github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39hnvdPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-h5x3-xfc9-m39hghsaADVISORY
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2026-48784.yamlghsaWEB
- github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-48784.yamlghsaWEB
- github.com/symfony/symfony/releases/tag/v5.4.53nvdProductRelease Notes
- github.com/symfony/symfony/releases/tag/v6.4.41nvdProductRelease Notes
- github.com/symfony/symfony/releases/tag/v7.4.13nvdProductRelease Notes
- symfony.com/cve-2026-48784ghsaWEB
News mentions
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