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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (47.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
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
- github.com/symfony/symfony/security/advisories/GHSA-6h46-9jf5-q59x (Patch, Vendor Advisory)
- github.com/symfony/symfony/commit/c48a4276309e11aedeeb0ce3a89dfbf0b4fe04ff (Patch)
- github.com/symfony/symfony/releases/tag/v5.4.53 (Product, Release Notes)
- github.com/symfony/symfony/releases/tag/v6.4.41 (Product, Release Notes)
- github.com/symfony/symfony/releases/tag/v7.4.13 (Product, 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.