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VulnerabilityPublished Updated

CVE-2026-93758: MongoDB Mongoid · Insecure Direct Object Reference

Affects MongoDB MongoidSource CVE Database V5

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Not known to be exploited · CVSS 8.6 High.

Data as of 2 Nov 2026, 22:58 UTC

CVSS 4.0 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Sep 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 2 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
MongoDB Inc.MongoidAffected
  • >=9.0.0 <=9.0.11
  • >=8.1.0 <=8.1.12
  • >=8.0.0 <=8.0.12
  • =9.1.0
Fixed in–
RubyGemsmongoidpkg:gem/mongoidOther threatsAffected
  • >=8.0.0 <=8.0.12
  • >=8.1.0 <=8.1.12
  • >=9.0.0 <=9.0.11
  • =9.1.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, applications should review and strengthen authorization checks around nested attribute handling to ensure proper ownership validation.

Description

An insecure direct object reference in the nested attributes handling of the Mongoid object-document mapper may allow a user with basic application privileges to reference a record identifier that is not their own. Processing such a request can cause that record to be looked up without the usual ownership or scoping restrictions, then updated and linked to the requesting user's own record. This may result in unintended disclosure and unauthorized modification of data belonging to other users of the application.

References

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