What is CVE-2026-27181?

CVE-2026-27181 is a high-severity vulnerability in Sergejey Majordomo, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-02-18.

How severe is CVE-2026-27181?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Sergejey Majordomo

CVE-2026-27181

MajorDoMo (aka Major Domestic Module) allows unauthenticated arbitrary module uninstallation through the market module. The market module's admin() method reads gr('mode') from $_REQUEST and assigns it to $this->mode at the start of execut…

Vulnerability class: Broken Access Control

EPSS: 0.001 (22.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Sergejey Majordomo — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

MajorDoMo Revisited: What I Missed in 2023 (third-party-advisory)
Fix PR: sergejey/majordomo#1177 (patch)
VulnCheck Advisory: MajorDoMo Unauthenticated Module Uninstall via Market Endpoint (third-party-advisory)

Frequently asked questions

What is CVE-2026-27181?: CVE-2026-27181 is a high-severity vulnerability in Sergejey Majordomo, classified under Missing Authorization. CVSS score: 7.5/10. Published 2026-02-18.
How severe is CVE-2026-27181?: High severity. CVSS v3 base score is 7.5 out of 10.