Auth bypass in Sensiolabs Symfony
CVE-2026-48489
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.
Vulnerability class: Broken Access Control
EPSS: 0.006 (46.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Sensiolabs Symfony
- Symfony Security-http — versions < 5.4.53, >= 6.0.0-BETA1, < 6.4.41, >= 7.0.0-BETA1, < 7.4.13
- Symfony — versions < 5.4.53, >= 6.0.0-BETA1, < 6.4.41, >= 7.0.0-BETA1, < 7.4.13
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-48489?
- CVE-2026-48489 is a high-severity vulnerability in Sensiolabs Symfony, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-07-14.
- How severe is CVE-2026-48489?
- High severity. CVSS v3 base score is 7.5 out of 10.