What’s Vulnerable › Vulnerabilities

CVE-2026-39850: Yii 2: Local file inclusion via view parameter name collision

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-20 · updated 2026-07-23
• Weakness: CWE-20

Description

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 yii: before 2.0.55

References

• https://github.com/yiisoft/yii2/commit/109878b491dbffa541032bc99fb5e26d12cd0375
• https://github.com/yiisoft/yii2/security/advisories/GHSA-5vpg-rj7q-qpw2

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