Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Affecting mongodb/libmongocrypt package, versions [,1.21.1)
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-UNMANAGED-MONGODBLIBMONGOCRYPT-21460688
- published23 Oct 2026
- disclosed22 Oct 2026
- creditUnknown
Introduced: 22 Oct 2026
NewCVE-2026-114655 (opens in a new tab)How to fix?
Upgrade mongodb/libmongocrypt to version 1.21.1 or higher.
Overview
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') via unsanitized key vault and KMS provider values inserted into KMS request lines, headers, and signed request bodies without validation or context-appropriate encoding. A user with write access to the key vault collection can alter the structure of outbound requests to external key management services (AWS, Azure, GCP), including injecting additional members into request bodies and token claims that the library then signs with the application's credentials, potentially causing key management operations to be performed with parameters the application did not intend.
Note: This is only exploitable by a user who has write access to the key vault collection.