Vulnerability · Published May 20, 2026 · Assigned by GitHub_M

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

High 7.4

In plain English

A high-severity improper input validation in yii2 from yiisoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)0.5%top 60.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	yiisoft/yii2	2.0.55	GHSA-5vpg-rj7q-qpw2

Affected products (as reported)

Vendor	Product	Versions
yiisoft	yii2	< 2.0.55

Weakness: CWE-20, CWE-98 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

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