CVE-2026-93758 Cross-principal document update, theft, and deletion via unvalidated id in nested attributes

High 8.6 Published 18 Sep 2026 Updated 21 Sep 2026

Attackers can access, modify, or delete other users' data by exploiting unvalidated IDs in nested attributes within the Mongoid library.

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

What is CVE-2026-93758?

CVE-2026-93758 is a high-severity missing authorization vulnerability in MongoDB Inc. Mongoid, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An insecure direct object reference in the nested attributes handling of the Mongoid object-document mapper may allow a user with basic application privileges to reference a record identifier that is not their own. Processing such a request can cause that record to be looked up without the usual ownership or scoping restrictions, then updated and linked to the requesting user's own record. This may result in unintended disclosure and unauthorized modification of data belonging to other users of the application.

Weakness: CWE-639

Which versions are affected by CVE-2026-93758?

It affects 1 product.

Products include Mongodb Mongoid.

How do I fix CVE-2026-93758?

No fix has been published for CVE-2026-93758 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-2026-93758 being exploited?

There is no known exploitation of CVE-2026-93758 in the wild and no public exploit code.

Sources

Also known as GHSA-7x44-w6qh-mj7w.