What is CVE-2026-44400?

CVE-2026-44400 is a high-severity vulnerability in Mailenable, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-05-08.

How severe is CVE-2026-44400?

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

Auth bypass in Mailenable

CVE-2026-44400

MailEnable Enterprise Premium 10.55 and earlier contains an improper authorization vulnerability in the WebAdmin mobile portal that allows attackers to bypass authentication checks by reusing AuthenticationToken cookies generated for low-p…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (9.0th 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

Mailenable
Mailenable Enterprise Premium — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (release-notes, Release Notes)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-44400?: CVE-2026-44400 is a high-severity vulnerability in Mailenable, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-05-08.
How severe is CVE-2026-44400?: High severity. CVSS v3 base score is 8.1 out of 10.