CVE-2026-27181 MajorDoMo Unauthenticated Module Uninstall via Market Endpoint

High 8.7 Published 18 Feb 2026 Updated 23 Jun 2026

Unauthenticated attackers can uninstall arbitrary modules and wipe the MajorDoMo installation via the market endpoint.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-27181?

CVE-2026-27181 is a high-severity missing authorization vulnerability in sergejey MajorDoMo, published on 18 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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 execution, making all mode-gated code paths reachable without authentication via the /objects/?module=market endpoint. The uninstall mode handler calls uninstallPlugin(), which deletes module records from the database, executes the module's uninstall() method via eval(), recursively deletes the module's directory and template files using removeTree(), and removes associated cycle scripts. An attacker can iterate through module names and wipe the entire MajorDoMo installation with a series of unauthenticated GET requests.

Weakness: CWE-862

Which versions are affected by CVE-2026-27181?

It affects 1 product.

Products include Mjdm Majordomo.

How do I fix CVE-2026-27181?

No fix has been published for CVE-2026-27181 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-27181 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27181 exists.

Sources

Also known as GHSA-5v24-5hr7-xg26.