Path Traversal in Joomla Joomla\!

CVE-2026-40383

An improper validation of user-supplied input leads to a local file inclusion vulnerability.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (0.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Joomla Joomla\!
Joomla! Project Cms — versions 3.2.1-5.4.5, 6.0.0-6.1.0

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security@joomla.org (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40383?: CVE-2026-40383 is a critical-severity vulnerability in Joomla Joomla\!, classified under Path Traversal. CVSS score: 9.8/10. Published 2026-05-26.
How severe is CVE-2026-40383?: Critical severity. CVSS v3 base score is 9.8 out of 10.