Vulnerability · Published Sep 18, 2026 · Assigned by mongodb
CVE-2026-93765Document deletion and process crash via unvalidated method-name dispatch in atomic pop operation
Critical 9.1
In plain English
A critical-severity security flaw in Mongoid from MongoDB Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).
Official description
Mongoid contains an unsafe reflection weakness in the document persistence layer of its object-document mapping code. Input whose keys are passed through from an unauthenticated party by an embedding application can cause unintended internal method invocation instead of the intended array field update. This may result in unintended removal of stored records and in the embedding application becoming unresponsive.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MongoDB Inc. | Mongoid | 9.1.09.0.0 – through 9.0.118.1.0 – through 8.1.128.0.0 – through 8.0.12 |
Weakness: CWE-470 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H