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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (26.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
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
- github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h (Patch, Vendor Advisory)
- github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d (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-2026-48784?
- 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.