CVE-2026-114653

CVE-2026-114653 · Silent client-side encryption bypass via unescaped field-name regex in CSFLE schema builder

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.1 · High · EPSS 0.2% · Fix available

Published

2026-10-22T19:13:58.414Z

Updated

2026-10-22T21:25:36.721Z

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