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CVE-2026-126818

Mongoid 9.1.1 incomplete CVE-2026-93764 fix stores descendant-only encrypted fields in plaintext

  • High 7.1

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.

Key facts

Published
13 Nov 2026
Last changed
13 Nov 2026
Assigned by
mongodb
EPSS
0.101% likely to be exploited in the next 30 days, higher than 0.914% of CVEs (scores for 15 Nov 2026)

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 7.1CVSS 4.0, Highfrom the CNA (mongodb)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  • 6.5CVSS 3.1, Mediumfrom the CNA (mongodb)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
MongoDBRuby Driver
  • Default status: unaffected
  • 9.0.0 (affected)
  • 9.0.1 (affected)
  • 9.0.2 (affected)
  • 9.0.3 (affected)
  • 9.0.4 (affected)
  • 9.0.5 (affected)
  • 9.0.6 (affected)
  • 9.0.7 (affected)
  • 9.0.8 (affected)
  • 9.0.9 (affected)
  • 9.0.10 (affected)
  • 9.0.11 (affected)
  • 9.0.12 (affected)
  • 9.1.0 (affected)
  • 9.1.1 (affected)

Timeline

  1. 13 Nov 2026 Published

Weakness

References