CVE-2026-48489

Analyzed Analyzed - Analysis Complete

Authentication Bypass in Symfony Framework

Publication date: 2026-07-14

Last updated on: 2026-07-16

Assigner: GitHub, Inc.

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, 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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-14

Last Modified

2026-07-16

Generated

2026-08-04

AI Q&A

2026-07-15

EPSS Evaluated

2026-08-02

NVD

CVE-2026-48489

Affected Vendors & Products

Vendor	Product	Version / Range
sensiolabs	symfony	to 5.4.53 (exc)
sensiolabs	symfony	From 6.0.0 (inc) to 6.4.41 (exc)
sensiolabs	symfony	From 7.0.0 (inc) to 7.4.13 (exc)
sensiolabs	symfony	From 8.0.0 (inc) to 8.0.13 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Attack-Flow Graph

Executive Summary

This vulnerability in Symfony allows unauthenticated users to bypass firewall protections by exploiting the _failure_path parameter when failure_forward is enabled. It enables access to access_control-protected GET routes without proper authentication.

Detection Guidance

Check Symfony application versions against affected releases (5.4.52 or lower, 6.4.40 or lower, 7.4.12 or lower, 8.0.12 or lower). Inspect firewall logs for unauthorized GET requests bypassing authentication. Review application configuration for failure_forward: true settings combined with _failure_path usage.

Impact Analysis

An attacker could exploit this to access sensitive routes without authentication, potentially stealing data or performing unauthorized actions. Systems using affected Symfony versions may face unauthorized access to protected resources.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating GDPR's data protection principles or HIPAA's security requirements. Non-compliance may result in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Upgrade Symfony to patched versions (5.4.53+, 6.4.41+, 7.4.13+, 8.0.13+). Disable failure_forward: true in security configurations. Remove or sanitize _failure_path parameter handling in authentication failure handlers.

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