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CVE-2026-93758— Cross-principal document update, theft, and deletion via unvalidated id in nested attributes

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 对象-文档映射器在处理嵌套属性时存在不安全的直接对象引用漏洞，这可能允许拥有基本应用权限的用户引用并非其自身拥有的记录标识符。处理此类请求时，该记录会在通常的归属或作用域限制之外被查找、更新，并与发起请求的用户的自身记录建立关联。这可能导致非预期的数据泄露，以及对其他用户数据的不授权修改。

CVSS 8.1 · High EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1021 · Remote Services

Affected Version Matrix 4

VendorProduct Version RangeStatus
MongoDB Inc. Mongoid 9.1.0 affected
9.0.0≤ 9.0.11 affected
8.1.0≤ 8.1.12 affected
8.0.0≤ 8.0.12 affected
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I. Basic Information for CVE-2026-93758

Vulnerability Information
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Vulnerability Title
Cross-principal document update, theft, and deletion via unvalidated id in nested attributes
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
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-2026-93758

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III. Intelligence Information for CVE-2026-93758

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Other References for CVE-2026-93758 (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-2026-93759 8.6 HIGH Server-side JavaScript injection via string query criteria bypassing the strict operator a
CVE-2026-93760 8.2 HIGH NoSQL injection of JavaScript-executing query operators via unsafe-by-default operator gua
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-639