CVE-2026-126818
Received
Received - Intake
Ruby Object-Document Mapper Field-Level Encryption Bypass via Class Inheritance
Vulnerability report for CVE-2026-126818, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-13
Last updated on: 2026-11-13
Assigner: MongoDB, Inc.
Description
Description
A Ruby object-document mapper does not apply its automatic field-level encryption configuration to certain fields when the data model uses class inheritance. Values the application designated for encryption are written to the database in readable form without any error or warning. A database account holding only read access to the application's collections, and no access to the encryption key store, may obtain those values.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| MongoDB | Ruby Driver | 9.0.0 |
| MongoDB | Ruby Driver | 9.0.1 |
| MongoDB | Ruby Driver | 9.0.2 |
| MongoDB | Ruby Driver | 9.0.3 |
| MongoDB | Ruby Driver | 9.0.4 |
| MongoDB | Ruby Driver | 9.0.5 |
| MongoDB | Ruby Driver | 9.0.6 |
| MongoDB | Ruby Driver | 9.0.7 |
| MongoDB | Ruby Driver | 9.0.8 |
| MongoDB | Ruby Driver | 9.0.9 |
| MongoDB | Ruby Driver | 9.0.10 |
| MongoDB | Ruby Driver | 9.0.11 |
| MongoDB | Ruby Driver | 9.0.12 |
| MongoDB | Ruby Driver | 9.1.0 |
| MongoDB | Ruby Driver | 9.1.1 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-311 | The product does not encrypt sensitive or critical information before storage or transmission. |
