CVE-2026-93759Network attack vectorHinoki check available

Server-side JavaScript injection via string query criteria

Published Sep 18, 2026 · Updated Sep 18, 2026

Code injection in MongoDB Mongoid allows remote attackers to execute database-side JavaScript through string-typed query criteria. The query builder passes a string criterion to MongoDB as a server-side JavaScript expression instead of restricting it to the strict operator allowlist. Exploitation requires an application to place attacker-controlled input in that query argument and can disclose stored fields, influence document selection for writes, or reduce database performance.

CVSS severity8.8
High
EPSS probability0.43%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Code injection in MongoDB Mongoid allows remote attackers to execute database-side JavaScript through string-typed query criteria. The query builder passes a string criterion to MongoDB as a server-side JavaScript expression instead of restricting it to the strict operator allowlist. Exploitation requires an application to place attacker-controlled input in that query argument and can disclose stored fields, influence document selection for writes, or reduce database performance.

The record

CVE
CVE-2026-93759
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
MongoDB
Product
Mongoid
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.0 <=8.0.12
  2. Affected versionversion=8.1.0 <=8.1.12
  3. Affected versionversion=9.0.0 <=9.0.11
  4. Affected versionversion=9.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MongoDB · Mongoidversion=8.0.0 <=8.0.12; version=8.1.0 <=8.1.12; version=9.0.0 <=9.0.11; version=9.1.0

Published CVSS scores

8.8MongoDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
8.6MongoDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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