CVE-2026-93759: Server-side JavaScript injection via string query criteria bypassing the strict operator allowlist
Mongoid does not neutralize a string-typed query criterion supplied to its query builder, and instead passes it to the database as a server-side JavaScript expression. An unauthenticated party able to influence the value an application supplies as a query argument may cause code of their choosing to be evaluated by the database engine. This may result in unintended disclosure of stored field values, unintended selection of documents for application-initiated writes, and reduced database performance.
Event History
Frequently Asked Questions
Which deployments are exposed to exploitation?
Deployments are exposed where an unauthenticated party can influence a value that the application supplies as a string-typed query argument to Mongoid's query builder.
What access does an attacker need?
No authentication or user interaction is required, but the attacker must be able to control the relevant application-provided query argument value.