CVE-2026-39393
8.1 · HIGHOverview
CVE-2026-39393 is a high-severity vulnerability affecting ci4-cms-erp ci4ms. It was published on April 8, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the install route guard in ci4ms relies solely on a volatile cache check (cache('settings')) combined with .env file existence to block post-installation access to the setup wizard. When the database is temporarily unreachable during a cache miss (TTL expiry or admin-triggered cache clear), the guard fails open, allowing an unauthenticated attacker to overwrite the .env file with attacker-controlled database credentials, achieving full application takeover. This vulnerability is fixed in 0.31.4.0.
Remediation
Check the references section for vendor advisories and patches from ci4-cms-erp. Update ci4ms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| ci4-cms-erp | ci4ms | >= 0, < 0.31.4.0 | Affected |
Frequently Asked Questions
What is CVE-2026-39393?
CVE-2026-39393 is a high-severity vulnerability affecting ci4-cms-erp ci4ms. It was published on April 8, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).
How severe is CVE-2026-39393?
This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-39393?
Check the references section for vendor advisories and patches from ci4-cms-erp. Update ci4ms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-39393?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-39393 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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