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CVE-2026-126818VulnerabilityPublished

A Ruby object-document mapper does not apply its automatic field-level encryption configuration to certain fields when

Source GCVE Database

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Authoritative record:CVE-2026-126818· High 7.1

Not known to be exploited · CVSS 7.1 High.

Data as of 13 Nov 2026, 20:05 UTC

CVSS 4.0 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (mongodb)CVSS 4.07.1
CNA (mongodb)CVSS 3.16.5
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 13 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
MongoDBRuby DriverAffected
  • 9.0.0 – 9.1.1
15 affected builds
Fixed in–

AI-suggested

Until a fix is available, users should review their data models for class inheritance usage and verify encryption is correctly applied. Restrict database read access to trusted accounts and monitor for any unauthorized access. Avoid relying solely on automatic encryption features in affected versions.

Description

A Ruby object-document mapper fails to apply automatic field-level encryption to certain fields when using class inheritance in the data model. As a result, values intended for encryption are stored in readable form in the database without any error or warning. This allows a database account with read-only access to the application's collections, but no access to the encryption key store, to obtain sensitive plaintext data.

References

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