What is CVE-2026-40178?

CVE-2026-40178 is a medium-severity vulnerability in Ajenti, classified under Improper Authentication. CVSS score: 5.9/10. Published 2026-04-10.

How severe is CVE-2026-40178?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Ajenti

CVE-2026-40178

ajenti.plugin.core defines all necessary core elements to allow Ajenti to run properly. Prior to 0.112, if the 2FA was activated, it was possible during a short moment after the authentication of an user to bypass its authentication. This vulnerability is fixed in 0.112.

Vulnerability class: Broken Authentication

EPSS: 0.002 (14.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Ajenti — versions < 0.112
Ajenti Ajenti_plugin_core

Weakness classification (CWE)

CWE-287 — Improper Authentication
CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-40178?: CVE-2026-40178 is a medium-severity vulnerability in Ajenti, classified under Improper Authentication. CVSS score: 5.9/10. Published 2026-04-10.
How severe is CVE-2026-40178?: Medium severity. CVSS v3 base score is 5.9 out of 10.