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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (18.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Ajenti — versions < 0.112
- Ajenti Plugin Core
Weakness classification (CWE)
References
- github.com/ajenti/ajenti/security/advisories/GHSA-8647-755q-fw9p (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.