# CVE-2026-47767

## Summary

- **CVE ID:** CVE-2026-47767
- **Severity:** HIGH
- **CVSS Score:** 8.3 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-436
- **Published:** Jul 14, 2026
- **Last Modified:** Jul 16, 2026

## Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.46 until 5.4.52, 6.4.40, 7.4.12, and 8.0.12, the CVE-2024-50340 fix gated runtime argv parsing on empty($_GET), but parse_str() and the web SAPI can disagree, allowing a crafted query string to leave $_GET empty while $_SERVER['argv'] still carries attacker-controlled --env or --no-debug flags that change APP_ENV or APP_DEBUG. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

## Affected Products

- symfony — symfony (>= 5.4.46, < 5.4.52)
- symfony — symfony (>= 6.4.14, < 6.4.40)
- symfony — symfony (>= 7.1.7, < 7.4.12)
- symfony — symfony (>= 8.0.0-BETA1, < 8.0.12)
- symfony — runtime (>= 5.4.46, < 5.4.52)
- symfony — runtime (>= 6.4.14, < 6.4.40)
- symfony — runtime (>= 7.1.7, < 7.4.12)
- symfony — runtime (>= 8.0.0-BETA1, < 8.0.12)

## References

- [CNA](https://github.com/symfony/symfony/security/advisories/GHSA-fqc7-9xjw-jrh3)
- [CNA](https://github.com/symfony/symfony/commit/3228c3806ee511008bea19a95084d460b17e5d25)
- [CNA](https://github.com/symfony/symfony/releases/tag/v5.4.52)
- [CNA](https://github.com/symfony/symfony/releases/tag/v6.4.40)
- [CNA](https://github.com/symfony/symfony/releases/tag/v7.4.12)
- [CNA](https://github.com/symfony/symfony/releases/tag/v8.0.12)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.72%
- **EPSS Percentile:** 51.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._