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Vulnerability details: VCID-fnw7-7c7z-5udv
Vulnerability ID VCID-fnw7-7c7z-5udv
Aliases CVE-2026-42334
GHSA-wpg9-53fq-2r8h
Summary 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.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00047 https://api.first.org/data/v1/epss?cve=CVE-2026-42334
cvssv3.1 7.5 https://github.com/Automattic/mongoose
generic_textual HIGH https://github.com/Automattic/mongoose
cvssv3.1 7.5 https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h
generic_textual HIGH https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h
ssvc Track https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h
cvssv3.1 7.5 https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()
generic_textual HIGH https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2026-42334
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-42334
cvssv3.1 7.5 https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html
generic_textual HIGH https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-42334
https://github.com/Automattic/mongoose
https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()
https://nvd.nist.gov/vuln/detail/CVE-2026-42334
https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html
GHSA-wpg9-53fq-2r8h https://github.com/advisories/GHSA-wpg9-53fq-2r8h
GHSA-wpg9-53fq-2r8h https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/Automattic/mongoose
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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unchanged

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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unchanged

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-05-14T18:17:58Z/ Found at https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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none

required

unchanged

changed

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-42334
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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none

required

unchanged

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high

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none

high

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.14915
EPSS Score 0.00047
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:44:13.167648+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/42xxx/CVE-2026-42334.json 38.6.0