CVE-2026-8201 – Use-After-Free in MongoDB FLE Query Analysis When Processing Positional Projections on Encrypted Fields

CVE ID :CVE-2026-8201

Published : May 13, 2026, 12:12 a.m. | 45 minutes ago

Description :A use-after-free vulnerability exists in MongoDB’s Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and crypt_shared. Triggering this vulnerability requires control over the structure of a client’s FLE-related query.

This issue impacts MongoDB Server’s mongocryptd component v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Severity: 6.4 | MEDIUM

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