CVE-2026-42334 | Mongoose: Improper Sanitization of $nor in sanitizeFilter May Allow NoSQL Injection

Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Prior to 6.13.9, 7.8.9, 8.22.1, and 9.1.6, a vulnerability allows bypassing Mongoose’s sanitizeFilter query sanitization mechanism via the $nor operator. When sanitizeFilter is enabled, Mongoose wraps query operators in $eq to neutralize them. However, prior to the fix, $nor was not included in the set of logical operators that are recursively sanitized. Because $nor accepts an array (like $and and $or), and arrays do not trigger hasDollarKeys(), malicious operators such as $ne, $gt, or $regex could be injected inside a $nor clause without being sanitized. This vulnerability is fixed in 6.13.9, 7.8.9, 8.22.1, and 9.1.6.

Published: 2026-05-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-42334 is rated Low Risk (36.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.27%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-42334

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.03% 0.27% +0.24%
2 2026-05-15 — 0.03% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-42334

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2026-42334

GitHub Security Advisory for CVE-2026-42334

GHSA-wpg9-53fq-2r8h · Severity: high · Ecosystem: npm — Mongoose's Improper Sanitization of $nor in sanitizeFilter May Allow NoSQL Injection

Affected software / configurations for CVE-2026-42334

Vendor Product Version Raw CPE
mongoosejs mongoose < 6.13.9 cpe:2.3:a:mongoosejs:mongoose:*:*:*:*:*:node.js:*:*
mongoosejs mongoose >= 7.0.0, < 7.8.9 cpe:2.3:a:mongoosejs:mongoose:*:*:*:*:*:node.js:*:*
mongoosejs mongoose >= 8.0.0, < 8.22.1 cpe:2.3:a:mongoosejs:mongoose:*:*:*:*:*:node.js:*:*
mongoosejs mongoose >= 9.0.0, < 9.1.6 cpe:2.3:a:mongoosejs:mongoose:*:*:*:*:*:node.js:*:*

References for CVE-2026-42334

cvelogic Threat Intelligence