CVE-2026-103475

CRITICAL 9.1CVE-2026-103475 · Published 30/09/2026 · updated 30/09/2026

In short

CVE-2026-103475 is a CRITICAL (CVSS 9.1) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 0.40%, higher than 33.9% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Description

yii2-starter-kit through 4.2.0 exposes the Yii debug and Gii modules to all IP addresses by setting allowedIPs to ['*'] in its default development configuration. Unauthenticated remote attackers can access the debug endpoint to read sensitive data including session cookies and database queries, or access the Gii endpoint to generate and write PHP files into the application directory.

References

yii-starter-kit/yii2-starter-kit
yii-starter-kit/yii2-starter-kit
yii-starter-kit/yii2-starter-kit
vulncheck.com/advisories/yii2-starter-kit-through-4.2.0-debug-and-gii-module-exposure

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