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.
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Timeline
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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.orgVulnerability recordCVE-2026-96297
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-96297
30-day exploitation probability 0.2%
first.org - Tenable CVE DatabaseVulnerability recordCVE-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
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