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Findings

CVE-2026-96297

Use of freed memory in the aggregation feature of MongoDB Server can cause the server to read data from a memory area after it has been released.

Published Oct 13, 2026

Use of freed memory in the aggregation feature of MongoDB Server can cause the server to read data from a memory area after it has been released. When an internal aggregation stage is combined with a batch size of 0, the server may read from memory that is no longer in use. Because that memory can be reused for other data before it is read, query results returned to the client may contain unrelated data from the server process. Depending on the state of memory at the time, the server process may also terminate unexpectedly. The behavior can occur when an authenticated user with read privileges runs an aggregate command that combines these two settings.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · Tenable CVE Database

    Detected

    Use of freed memory in the aggregation feature of MongoDB Server can cause the server to read data from a memory area after it has been released. When an internal aggregation stage is combined with a batch size of 0, the server may read from memory that is no longer in use. Because that memory can be reused for other data before it is read, query results returned to the client may contain unrelate

Sources

  • CVE.orgCVE-2026-96297

    Official CVE identifier

    cve.org
  • Tenable CVE DatabaseCVE-2026-96297

    Use of freed memory in the aggregation feature of MongoDB Server can cause the server to read data from a memory area after it has been released. When an internal aggregation stage is combined with a batch size of 0, the server may read from memory that is no longer in use. Because that memory can be reused for other data before it is read, query results returned to the client may contain unrelate

    tenable.com