CVE-2026-47767
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Sensiolabs Symfony
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-436CWE-436
How to fix
Update
- sensiolabs symfony5.4.52, 6.4.40, 7.4.12, 8.0.12 or later
- symfony/runtime5.4.52, 6.4.40, 7.4.12, 8.0.12 or later
- symfony/symfony5.4.52, 6.4.40, 7.4.12, 8.0.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| sensiolabs symfony | 5.4.46 ≤ v < 5.4.52, 6.4.14 ≤ v < 6.4.40, 7.1.7 ≤ v < 7.4.12, 8.0.0 ≤ v < 8.0.12 | 5.4.52, 6.4.40, 7.4.12, 8.0.12 |
| symfony/runtimePackagist | 5.4.46 ≤ v < 5.4.52, 6.4.14 ≤ v < 6.4.40, 7.1.7 ≤ v < 7.4.12, 8.0.0 ≤ v < 8.0.12 | 5.4.52, 6.4.40, 7.4.12, 8.0.12 |
| symfony/symfonyPackagist | 5.4.46 ≤ v < 5.4.52, 6.4.14 ≤ v < 6.4.40, 7.1.7 ≤ v < 7.4.12, 8.0.0 ≤ v < 8.0.12 | 5.4.52, 6.4.40, 7.4.12, 8.0.12 |
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