TI-2026-28732 Aliases CVE-2026-39850 GHSA-5vpg-rj7q-qpw2

Yii 2: Local file inclusion via view parameter name collision

LOW 35CWE-20Published 2026-05-20 · Updated 2026-05-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-98.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00455 39th percentileScored 2026-11-07

Fix Fixed yii2 (yiisoft): 2.0.55yiisoft/yii2 (Packagist): 2.0.55

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Yiiframework	yii2	before 2.0.55	2.0.55	Patch available	CNA
—	yiisoft/yii2 (Packagist)	before 2.0.55	2.0.55	Patch available	GHSA-5vpg-rj7q-qpw2

yii2 VendorYiiframework Affected before 2.0.55 Fixed in 2.0.55 Patch available CNA
yiisoft/yii2 (Packagist) Vendor— Affected before 2.0.55 Fixed in 2.0.55 Patch available GHSA-5vpg-rj7q-qpw2

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:yiiframework:yii::::::::	—	—	Yiiframework

cpe:2.3:a:yiiframework:yii:*:*:*:*:*:*:*:* Versions — — ·Yiiframework

Remediation

Fix · CNA yii2 (yiisoft) Fixed in 2.0.55
Fix · GHSA-5vpg-rj7q-qpw2 yiisoft/yii2 (Packagist) Fixed in 2.0.55 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-39850
2026-10-03 Alias added: GHSA-5vpg-rj7q-qpw2

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-39850

Other 4

TI-2024-38344 Yii 2 before 2.0.52 mishandles the attaching of behavior that is defined by an __class… KEVCVSS 3.1CRITICAL 9.8
TI-2020-11920 Unsafe deserialization in Yii 2 CVSS 3.1CRITICAL 10.0
TI-2024-04634 Unsafe Reflection in base Component class in yiisoft/yii2 CVSS 3.1CRITICAL 9.1
TI-2020-18848 Yii Yii2 Gii before 2.2.2 allows remote attackers to execute arbitrary code via the… CVSS 3.1HIGH 8.8
TI-2025-02355 yiisoft Yii2 MockClass.php generate deserialization CVSS 4.0MEDIUM 5.3
TI-2025-02354 yiisoft Yii2 SortableIterator.php getIterator deserialization CVSS 4.0MEDIUM 5.3

See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences