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CVE-2026-92756

Combining encryption settings may disable encryption

Applications built on MongoDB Entity Framework Core Provider which combine independent encryption settings and this provider's encryption settings may silently lose TLS and schema-map settings leading to protected fields being stored unencrypted in the database.

CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Entity Framework Core Provider Mongodb Entity Framework Core Provider
CVE-2026-75159

MongoDB BI Connector Improper Memory Handling During Failed Kerberos Authentication May Cause Process Termination

An unauthenticated client that can reach a MongoDB Connector for BI deployment configured with Kerberos authentication may cause mongosqld to terminate when a crafted authentication exchange encounters a specific GSSAPI error-handling condition. This can interrupt BI Connector availability until the process restarts.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector
CVE-2026-75573

MongoDB Connector for BI mongodrdl Logs TLS Private-Key Password When Duplicate Options Are Supplied

In MongoDB Connector for BI, mongodrdl may write a TLS private-key password to standard error when the password is supplied through both the connection URI and the corresponding command-line option. A local user with access to the captured command output and encrypted key file may use the disclosed password to access the associated TLS client key.

CVSS 4.0 · 4.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector
CVE-2026-84963

Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parser

An incorrect numeric conversion in the JSON parsing component of the MongoDB C Driver's BSON library may cause an unusually large text value to be silently shortened, or the corresponding field to be omitted, while the parsing operation still reports success and returns no error. An unauthenticated party who can supply the input processed by an application that uses this component may cause that application to hold data that does not match what was submitted, which may result in unintended alteration of data.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C Driver
CVE-2026-84964

Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS client

A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be reached by a TLS endpoint that the client already trusts. During the handshake, specially formed certificate data can cause the same heap object to be released twice. An unauthenticated party acting as the trusted endpoint may cause the connecting client application to terminate unexpectedly.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C Driver
CVE-2026-84965

Heap write primitive via size round-up wrap during JSON parsing on 32-bit builds

An integer wraparound in an allocation size calculation in the BSON library's JSON parsing code can cause a buffer to be released while a following copy operation still writes through the stale pointer. On builds where sizes are 32 bits, an unauthenticated party able to supply a sufficiently large JSON input to an application that links the library may cause that application to terminate unexpectedly, resulting in denial of service.

CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C Driver
CVE-2026-84966

BSON element injection via NUL-embedded document keys in builder append

An incorrect numeric type conversion in the BSON document building component of the MongoDB C++ Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremely large, non-terminated field name to the builder, the library may read memory outside the intended buffer and terminate the calling process. No authentication is required, but the calling application must pass the oversized name in a specific form.

CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C++ Driver C\+\+ Driver
CVE-2026-13062

MongoDB mongos Improper Validation of Internal Flags in Queryable Encryption Write Commands on Sharded Clusters

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 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-13060

$graphLookup Aggregation Stage Authorization Check Inconsistency Allowing Unauthorized Collection Access

An authenticated user with limited read privileges may be able to access documents from collections they are not authorized to read, due to an inconsistency in how the $graphLookup aggregation stage is evaluated during authorization and during execution. Affected scenarios involve collections referenced within existing view pipeline definitions.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-76797

MongoSQL Transition Readiness Tool Improper Neutralization of Formula Elements in Generated Reports

The MongoSQL Transition Readiness Tool writes database and collection names into its generated CSV reports without neutralizing leading characters that spreadsheet applications treat as formulas. A user with write privileges on the cluster can choose a namespace name that is later evaluated as a formula when an operator opens the generated report in a spreadsheet application, which may result in unintended disclosure of report contents or execution of external content on the operator's workstation. Generating a report for the affected namespace and opening it in a spreadsheet application is required.

CVSS 4.0 · 5.8 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector Transition Readiness Report Mongosql Transition Readiness Tool
CVE-2026-76798

MongoSQL Transition Readiness Tool Improper Output Encoding in Generated HTML Reports

The MongoSQL Transition Readiness Tool writes query text and user names read from BI Connector log files into its generated HTML report without encoding them for that output context. A user able to issue queries through the BI Connector can influence log content so that markup supplied in a query is interpreted by the browser when an operator later generates and opens the report, which may disclose other users' logged query text and user names to an external party or present misleading content to the operator. Generating a report over logs containing the affected entries and opening that report in a browser is required.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector Transition Readiness Report Mongosql Transition Readiness Tool
CVE-2026-76794

MongoDB BI Connector Transition Readiness Report Improper HTML Encoding When Processing Database Metadata

MongoSQL Transition Readiness Tool does not sufficiently encode database metadata before including it in generated HTML. A MongoDB user with write access can introduce crafted metadata that may cause script code to run when another user generates and opens the report, potentially exposing report contents or altering its display.

CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector Transition Readiness Report Mongosql Transition Readiness Tool
CVE-2026-84962

Authenticated KMS request forgery via CRLF injection in GCP key identifier strings

An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and defeating client-side encryption.

CVSS 4.0 · 5.7 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Libmongocrypt
CVE-2026-81523

Cross-tenant database retargeting via dot/NUL injection in namespace strings in libmongocrypt

A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selection, which may lead to limited disclosure or modification of information handled by the application.

CVSS 4.0 · 2 Low EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Libmongocrypt
CVE-2026-84971

Persistent client crash loop via undersized FLE2 insert-update ciphertext in decryption path

Improper handling of an unexpected value size in the decryption path of a client-side encryption library can cause a failed internal check that terminates the process using the library. A party able to place a suitably formed encrypted value where an application will decrypt it, or able to control the responses the application receives, may cause that application to stop running.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Libmongocrypt
CVE-2021-20327

MongoDB Node.js client side field level encryption library may not be validating KMS certificate

A specific version of the Node.js mongodb-client-encryption module does not perform correct validation of the KMS server’s certificate. This vulnerability in combination with a privileged network position active MITM attack could result in interception of traffic between the Node.js driver and the KMS service rendering client-side field level encryption (CSFLE) ineffective. This issue was discovered during internal testing and affects mongodb-client-encryption module version 1.2.0, which was available from 2021-Jan-29 and deprecated in the NPM Registry on 2021-Feb-04. This vulnerability does not impact driver traffic payloads with CSFLE-supported key services from applications residing inside the AWS, GCP, and Azure nework fabrics due to compensating controls in these environments. This issue does not impact driver workloads that don’t use Field Level Encryption. This issue affect MongoDB Node.js Driver mongodb-client-encryption module version 1.2.0

CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Client Encryption
CVE-2026-82052

$regexFindAll may crash mongod server when byte-matching multi-byte UTF-8 chars

The $regexFindAll expression can be used by an authenticated user who can run aggregation pipeline stages to crash a MongoDB server (mongod). Under certain specific conditions the  regex match can start in the middle of a multi-code-unit character, triggering an assertion during query execution.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-82053

Improper Session Handling in MongoDB Server LDAP Authorization Integration Leads to Incorrect Role Assignment

A security issue exists in MongoDB's LDAP authorization integration where pooled LDAP connections can retain stale authentication identities after user authentication under certain configurations. Subsequent authorization queries may execute under an unintended LDAP identity rather than the expected one. This can result in incorrect role assignments based on the LDAP directory's access control configuration, potentially allowing an authenticated user to acquire elevated privileges that were not intended by the deployment's authorization policy.

CVSS 4.0 · 7.6 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server