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.
CVE-2026-39850
This high-severity CVE scores 7.4 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.4
- EG Score
- 7.4(medium)
- EG Risk
- —
- EPSS
- 36.1%
- KEV
- Not listed
Published
May 20, 2026
Last Modified
May 21, 2026
Advisory Details (2)
Auto-updated Jun 9, 2026Local file inclusion via view parameter name collision · Advisory · yiisoft/yii2 · GitHub
https://github.com/yiisoft/yii2/security/advisories/GHSA-5vpg-rj7q-qpw2commit 109878b491db (yiisoft/yii2)
Patch available: yiisoft/yii2 2.0.55 (contains commit 109878b491db)
https://github.com/yiisoft/yii2/commit/109878b491dbffa541032bc99fb5e26d12cd0375Vendor Advisories for CVE-2026-39850(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Packagist(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| yiisoft/yii2 | 2.0.0 ... 2.0.9 (79 versions) | 2.0.55 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 35× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:08 UTCEPSS rescore
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- 2026-07-17 22:59 UTCOSV refresh
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- 2026-07-01 15:06 UTCEPSS rescore
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- 2026-05-26 07:18 UTCEPSS rescore
- 2026-05-26 07:18 UTCEPSS rescore
- 2026-05-20 21:38 UTCEG score recompute
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-39850?
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Dependency Blast Radius
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