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CVE-2026-114653

Silent client-side encryption bypass via unescaped field-name regex in CSFLE schema builder PUBLISHED

Description (CNA)

A client-side encryption schema construction component in the MongoDB C# Driver places caller-supplied field identifiers into a position that is interpreted as a pattern expression, without normalizing or validating them. As a result, an application that designates certain fields for client-side field-level encryption may have the protection silently fail to apply, so data intended to be encrypted is stored and returned in cleartext; conversely, the rule may apply more broadly than intended. No user action is required to cause the condition, and any party with ordinary read access to the stored data — without possession of the encryption keys — can observe the unprotected values.

Affected (CNA)

Vendor / productVersions
MongoDB / C# Driveraffected 3.5.0 before 3.13.0

CWE

CWE-185

References