CVE-2026-48784
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
6.1 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-172
Source
GitHub
Vendor
composer
Product
symfony/routing
External References
- https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h
- https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2026-48784.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-48784.yaml
- https://symfony.com/cve-2026-48784
- https://github.com/advisories/GHSA-h5x3-xfc9-m39h
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