Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Affecting mongoose package, versions <6.13.9>=7.0.0-rc0 <7.8.9>=8.0.0-rc0 <8.22.1>=9.0.0-rc0 <9.1.6
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-MONGOOSE-16425765
- published6 May 2026
- disclosed5 May 2026
- creditJeremy Katz
Introduced: 5 May 2026
NewCVE-2026-42334 (opens in a new tab)How to fix?
Upgrade mongoose to version 6.13.9, 7.8.9, 8.22.1, 9.1.6 or higher.
Overview
mongoose is a Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment.
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in the sanitizeFilter function. An attacker can gain unauthorized access to sensitive data by injecting malicious query operators inside a $nor clause when user-controlled input is passed directly into query methods.
Note: This is only exploitable if the application explicitly enables the sanitization feature and passes unsanitized user input directly into query methods without additional input validation.
Workaround
This vulnerability can be mitigated by deleting $nor keys from user input, using an additional schema validation library, or writing middleware to strip out $nor from query filters.