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CVE-2026-125120— Mongoose: sanitizeFilter not applied on countDocuments

Quick assessment

Affected

Automattic mongoose

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.

Mongoose 是一个专为异步环境设计的 MongoDB 对象建模工具。在 6.13.11、7.8.12、8.24.3 和 9.9.2 版本之前，Mongoose 的方法未应用已配置的查询选择器注入防御机制。因此，若应用程序启用了并将攻击者可控的过滤条件值传递给，该方法会将查询操作符对象误解析为操作符而非字面值，导致计数结果包含本不应匹配的文档，进而可能破坏基于该计数值的授权机制或应用程序逻辑。该问题已在 6.13.11、7.8.12、8.24.3 和 9.9.2 版本中修复。

CVSS 9.8 · Critical Updated Nov 10, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Mongoose: sanitizeFilter not applied on countDocuments

Source: CVE Program / CVE List V5

Vulnerability Description

Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Prior to 6.13.11, 7.8.12, 8.24.3, and 9.9.2, Mongoose countDocuments() does not apply the configured sanitizeFilter query selector injection defense. An application that enables sanitizeFilter and passes attacker-controlled filter values to countDocuments() can therefore process query operator objects as operators rather than literal values, causing the count to include documents that should not match and potentially undermining authorization or application logic based on that count. This issue is fixed in versions 6.13.11, 7.8.12, 8.24.3, and 9.9.2.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

数据查询逻辑中特殊元素的不当中和

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Automattic	mongoose	< 6.13.11	-

II. Public POCs for CVE-2026-125120

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-125120

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Patches & Fixes for CVE-2026-125120 (3)

Vendor Advisories for CVE-2026-125120 (1)

🔗 sanitizeFilter not applied on countDocuments · Advisory · Automattic/mongoose · GitHub x_refsource_CONFIRM

Vendor Pages for CVE-2026-125120 (3)

🔗 Release 8.24.3 · Automattic/mongoose · GitHub x_refsource_MISC
🔗 Release 7.8.12 · Automattic/mongoose · GitHub x_refsource_MISC
🔗 Release 6.13.11 · Automattic/mongoose · GitHub x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2026-125120

Same Patch Batch · Automattic · 2026-11-09 · 5 CVEs total

CVE-2026-125117	8.2 HIGH	Mongoose walks into inherited properties when hydrating, setting, and merging, allowing ov
CVE-2026-125119	7.5 HIGH	Mongoose: Connection-level sanitizeFilter not applied
CVE-2026-125118	6.5 MEDIUM	Mongoose: Prototype pollution via Schema.prototype.virtual()
CVE-2026-125116	4.8 MEDIUM	Mongoose: Discriminator key values matching inherited properties (e.g. __t: 'constructor')

IV. Related Vulnerabilities

Same product: mongoose

Same vendor: Automattic

Same weakness: CWE-943