# CVE-2026-48784: symfony: Symfony is a PHP framework for web and console applications and a set of reusable PHP components

CVE-2026-48784 is fixed in symfony on 1 platform, first by DEBIAN-CVE-2026-48784, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-48784
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0035
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 14, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | symfony Debian 12.15 (bookworm) | 5.4.53+dfsg-0+deb12u1 | [DEBIAN-CVE-2026-48784](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48784.md) | Jun 24, 2026 |
| Linux | symfony Debian 13.5 (trixie) | 6.4.41+dfsg-0+deb13u1 | [DEBIAN-CVE-2026-48784](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48784.md) | Jun 24, 2026 |
| Linux | symfony Debian 14 | 7.4.13+dfsg-1 | [DEBIAN-CVE-2026-48784](https://patchblox.com/security/data/fix/linux/debian-cve-2026-48784.md) | Jun 24, 2026 |

---

Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.