Open Redirect in Sensiolabs Symfony
CVE-2026-48784
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.
EPSS: 0.003 (27.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Sensiolabs Symfony
- Symfony Routing — 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-2026-48784?
- CVE-2026-48784 is a medium-severity vulnerability in Sensiolabs Symfony, classified under CWE-172. CVSS score: 6.1/10. Published 2026-07-14.
- How severe is CVE-2026-48784?
- Medium severity. CVSS v3 base score is 6.1 out of 10.