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CVE PROGRAM SOURCE RECORD7.7 High

CVE-2026-8336

Post-authentication use-after-free error in $_internalJsEmit and mapreduce commands

Description

After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service. This issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

MongoDB, Inc. MongoDB Server

Default version status: unaffected

  • 8.2 to < 8.2.9affected
  • 8.3 to < 8.3.2affected

References