Mongodb: >> Mongodb >> 8.0.18 Security Vulnerabilities
An authenticated user can cause excessive CPU consumption or out-of-memory conditions on a MongoDB server by sending a crafted Queryable Encryption find payload containing an unvalidated field used to control an internal computation loop. The resulting resource exhaustion degrades availability for other operations.
CVSS Score
7.1
EPSS Score
0.002
Published
2026-07-22
A MongoDB server initiating an outbound TLS connection may terminate abnormally when processing a malformed OCSP response from a remote peer during the TLS handshake. OCSP stapling validation is enabled by default for outgoing TLS connections. Affected scenarios require the remote peer to hold a certificate issued by the cluster's trusted certificate authority, or for the connection to traverse an untrusted network path.
CVSS Score
6.0
EPSS Score
0.001
Published
2026-07-22
An authenticated user with read access can cause the mongod process to be terminated through certain aggregation expressions that execute server-side JavaScript. The issue involves improper memory handling during document processing.
CVSS Score
7.1
EPSS Score
0.003
Published
2026-07-22
When compute mode is enabled on a standalone mongod instance, insufficient validation of externally sourced BSON data during aggregation pipeline processing can result in memory corruption, potentially leading to process termination or other unintended behavior. This configuration is non-default and requires explicit enablement at startup.
CVSS Score
9.2
EPSS Score
0.004
Published
2026-07-22
An authenticated user with read-only privileges can cause the mongod process to terminate abnormally by issuing a crafted aggregation command, resulting in denial of service for all connected clients until the process is restarted. The issue stems from an internal engine selection inconsistency triggered by a specific combination of aggregation options.
CVSS Score
5.3
EPSS Score
0.002
Published
2026-07-22
An authenticated user may be able to view session metadata belonging to other users on the system through the $listSessions aggregation stage. This information is normally restricted to users with cluster-level administrative privileges, and includes active session identifiers, associated usernames, and activity timestamps.
CVSS Score
5.3
EPSS Score
0.003
Published
2026-07-22
An authenticated user with write privileges on a Queryable Encryption-enabled collection may be able to modify internal encryption metadata fields that are intended to be server-controlled, by sending crafted write commands through the mongos router on a sharded cluster. This can result in corruption of encrypted query correctness.
CVSS Score
7.1
EPSS Score
0.002
Published
2026-07-22
Certain query operations involving deeply nested $jsonSchema constructs can trigger disproportionate CPU consumption in affected MongoDB deployments, potentially leading to resource exhaustion. The resulting CPU-bound operation cannot be interrupted through standard administrative controls.
CVSS Score
7.1
EPSS Score
0.005
Published
2026-07-22
A user with read-only privileges is able to craft an aggregation pipeline using the $linearFill window function operator with a specific sortBy expression type to cause the mongod process to terminate abnormally, resulting in denial of service. The issue stems from insufficient validation of sort specifications during execution.
CVSS Score
7.1
EPSS Score
0.005
Published
2026-07-22
Improper handling of DBPointer objects during BSON serialization in MongoDB's server-side JavaScript engine can result in internal process memory contents being included in data returned to the client. This constitutes an unintended information disclosure affecting deployments that use server-side JavaScript.
CVSS Score
7.1
EPSS Score
0.004
Published
2026-07-22