What is CVE-2026-39389?

CVE-2026-39389 is a medium-severity vulnerability in Ci4-Cms-Erp Ci4ms, classified under Improper Authorization. CVSS score: 6.7/10. Published 2026-04-08.

How severe is CVE-2026-39389?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Auth bypass in Ci4-Cms-Erp Ci4ms

CVE-2026-39389

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, This vulnerability is fixed in 0.31.4.0.

Published 2026-04-08 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.005 (39.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Ci4-Cms-Erp Ci4ms — versions < 0.31.4.0

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-9rxp-f27p-wv3h (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-39389?: CVE-2026-39389 is a medium-severity vulnerability in Ci4-Cms-Erp Ci4ms, classified under Improper Authorization. CVSS score: 6.7/10. Published 2026-04-08.
How severe is CVE-2026-39389?: Medium severity. CVSS v3 base score is 6.7 out of 10.