MongoDB mongo-express Remote Code Execution Vulnerability

mongo-express before 0.54.0 is vulnerable to Remote Code Execution via endpoints that uses the `toBSON` method.

Published 8 Oct 2026Updated 8 Oct 2026126 sources
CVSS 9.9 ✓ VERIFIED REFERENCE△ CISA KEV

What happened

mongo-express before 0.54.0 is vulnerable to Remote Code Execution via endpoints that uses the `toBSON` method.

Affected versions

mongo-express: See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

  • Review the original advisory and validate affected versions.
  • Apply vendor-provided updates or mitigations when available.

Public PoC references