CVE-2026-39850: Yiisoft YII2

High severity, CVSS 7.4. EPSS: 0.5% chance of exploitation in the next 30 days.

Yii 2 is a PHP application framework. Versions 2.0.54 and prior contain flawed logic in the core view rendering method View::renderPhpFile() that leads to Local File Inclusion. The function calls extract($_params_, EXTR_OVERWRITE) before the require statement that loads the view file. As a result, a caller-controlled _file_ key in the $params array overwrites the internal local variable specifying which file to include, potentially enabling RCE if an attacker can write PHP files through a separate primitive, as well as information disclosure. This issue has been fixed in version 2.0.55.

Affected products

• Yiisoft YII2: before 2.0.55 (fixed in 2.0.55)

Published 2026-05-20. Last modified 2026-07-23.