CVE-2026-93759

Server-side JavaScript injection via string query criteria bypassing the strict operator allowlist

HIGH
8.6
CVSS Score
Published: September 18, 2026 at 05:27 PM UTC
Updated: September 24, 2026 at 04:37 PM UTC
1 product affected across 1 vendorMongoid

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Severity
HIGH8.6
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

Mongoid does not neutralize a string-typed query criterion supplied to its query builder, and instead passes it to the database as a server-side JavaScript expression. An unauthenticated party able to influence the value an application supplies as a query argument may cause code of their choosing to be evaluated by the database engine. This may result in unintended disclosure of stored field values, unintended selection of documents for application-initiated writes, and reduced database performance.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

8.0.0 ≤ v ≤ 8.0.128.0.0 ≤ v < 8.0.138.1.0 ≤ v ≤ 8.1.128.1.0 ≤ v < 8.1.139.0.0 ≤ v ≤ 9.0.119.0.0 ≤ v < 9.0.128.0.08.1.09.0.09.1.0
Affected range stops below 8.0.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.1.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Permissions Required
Source: cverecord
https://jira.mongodb.org/browse/MONGOID-5993

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.6HIGHmongodb
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-94

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