Unsafe Reflection Vulnerability in Mongoid by MongoDB
CVE-2026-93765

8.3HIGH

Key Information:

Vendor

MongoDB

Status
Vendor
CVE Published:
18 September 2026

What is CVE-2026-93765?

Mongoid has a vulnerability that allows for unsafe reflection in its document persistence layer. This weakness arises when input from an unauthenticated source is processed. Instead of executing the intended array field update, the application may inadvertently invoke internal methods, leading to potential data loss or making the embedding application unresponsive. It’s crucial for users to address this issue to maintain the integrity and performance of their systems.

Affected Version(s)

Mongoid 9.1.0

Mongoid 9.0.0 <= 9.0.11

Mongoid 8.1.0 <= 8.1.12

References

CVSS V4

Score:
8.3
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.