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CVE-2026-93759— Server-side JavaScript injection via string query criteria bypassing the strict operator allowlist

Quick assessment

Affected
MongoDB Inc. Mongoid
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 argu

CVSS 8.6 · High
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I. Basic Information for CVE-2026-93759

Vulnerability Information

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Vulnerability Title
Server-side JavaScript injection via string query criteria bypassing the strict operator allowlist
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MongoDB Inc. Mongoid 9.1.0 -

II. Public POCs for CVE-2026-93759

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III. Intelligence Information for CVE-2026-93759

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Other References for CVE-2026-93759 (1)

Same Patch Batch · MongoDB Inc. · 2026-09-18 · 8 CVEs total

CVE-2026-93762 9.8 CRITICAL Data deletion and attribute disclosure via field-name method injection in in-memory querie
CVE-2026-93765 9.1 CRITICAL Document deletion and process crash via unvalidated method-name dispatch in atomic pop ope
CVE-2026-93760 8.2 HIGH NoSQL injection of JavaScript-executing query operators via unsafe-by-default operator gua
CVE-2026-93758 8.1 HIGH Cross-principal document update, theft, and deletion via unvalidated id in nested attribut
CVE-2026-93761 7.5 HIGH Denial of service via unbounded regex matching in Mongoid's in-memory query matcher
CVE-2026-93763 6.5 MEDIUM Silent plaintext persistence via unresolved callable database name in encryption schema ma
CVE-2026-93764 6.5 MEDIUM Plaintext storage of encrypted fields via skipped embedded models in encryption schema gen

IV. Related Vulnerabilities

Same product: Mongoid
Same vendor: MongoDB Inc.
Same weakness: CWE-94

V. Comments for CVE-2026-93759

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