What is CVE-2026-39394?

CVE-2026-39394 is a high-severity vulnerability in Ci4-cms-erp Ci4ms, classified under CRLF Injection. CVSS score: 8.1/10. Published 2026-04-08.

How severe is CVE-2026-39394?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Ci4-cms-erp Ci4ms

CVE-2026-39394

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::index() controller reads the host POST parameter without any vali…

Vulnerability class: CRLF Injection

EPSS: 0.000 (9.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ci4-cms-erp Ci4ms — versions < 0.31.4.0

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-vfhx-5459-qhqh (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-39394?: CVE-2026-39394 is a high-severity vulnerability in Ci4-cms-erp Ci4ms, classified under CRLF Injection. CVSS score: 8.1/10. Published 2026-04-08.
How severe is CVE-2026-39394?: High severity. CVSS v3 base score is 8.1 out of 10.