# CVE-2026-48784

## Summary

- **CVE ID:** CVE-2026-48784
- **Severity:** MEDIUM
- **CVSS Score:** 5.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N)
- **CWE:** CWE-172, CWE-601
- **Published:** Jul 14, 2026
- **Last Modified:** Jul 15, 2026

## 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, 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.

## Affected Products

- symfony — symfony (< 5.4.53)
- symfony — symfony (>= 6.0.0-BETA1, < 6.4.41)
- symfony — symfony (>= 7.0.0-BETA1, < 7.4.13)
- symfony — symfony (>= 8.0.0-BETA1, < 8.0.13)
- symfony — routing (< 5.4.53)
- symfony — routing (>= 6.0.0-BETA1, < 6.4.41)
- symfony — routing (>= 7.0.0-BETA1, < 7.4.13)
- symfony — routing (>= 8.0.0-BETA1, < 8.0.13)

## References

- [CNA](https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h)
- [CNA](https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d)
- [CNA](https://github.com/symfony/symfony/releases/tag/v5.4.53)
- [CNA](https://github.com/symfony/symfony/releases/tag/v6.4.41)
- [CNA](https://github.com/symfony/symfony/releases/tag/v7.4.13)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._