CVE-2026-18704 — Improper Authorization in MongoDB Aggregation Framework Allows Read-Only User to Perform Unauthorized Write Operations
An issue in MongoDB Server's aggregation framework could allow an authenticated user with only read privileges to perform write operations against collections they should not be…
Published: 2026-08-11 · CVSS: 7.1 · CVSS 4.0
An issue in MongoDB Server's aggregation framework could allow an authenticated user with only read privileges to perform write operations against collections they should not be able to modify. This is due to an internal-use aggregation stage being reachable by external clients without an appropriate authorization check on its embedded operations.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7