CVE-2026-48489: Sensiolabs Symfony

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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, DefaultAuthenticationFailureHandler honored the request-supplied _failure_path parameter when failure_forward: true was enabled, allowing an unauthenticated failing login request to dispatch a subrequest to access_control-protected GET routes that skipped firewall listeners. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

Affected products

• Sensiolabs Symfony: before 5.4.53 (fixed in 5.4.53); from 6.0.0, before 6.4.41 (fixed in 6.4.41); from 7.0.0, before 7.4.13 (fixed in 7.4.13); from 8.0.0, before 8.0.13 (fixed in 8.0.13)

Published 2026-07-14. Last modified 2026-07-16.