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CVE-2026-77586

MongoDB Connector for BI Unescaped Object Names in Generated SHOW CREATE Output

In MongoDB Connector for BI, MongoDB object names such as collection, field, and index names are placed into the quoted identifiers of the DDL text returned by SHOW CREATE statements without escaping the identifier delimiter. A user with permission to write to a sampled MongoDB collection can choose a name that closes the quoted identifier early, so that additional SQL text becomes part of the generated output. If an operator or automated tool later replays that generated statement against a SQL server, the additional text is executed with the privileges of that session.

CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector
CVE-2026-81490

MongoDB Connector for BI Improper Error Handling During Schema Sampling May Cause Loss of SQL Service

A database user able to create a view in a namespace that MongoDB Connector for BI samples can cause the schema-sampling routine to stop functioning by defining a view whose evaluation reliably fails. The sampling logic classifies the resulting server message as transient and, after the configured retries are exhausted, proceeds without a valid result, ending the schema refresh routine. The mongosqld process continues running without a usable schema, so SQL clients are unable to obtain results until an operator removes the view or excludes its namespace from sampling.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector
CVE-2026-81517

MongoDB Connector for BI Improper Error Handling of Log Write Failures May Cause Loss of SQL Service

An unauthenticated party able to reach the port of a MongoDB Connector for BI (mongosqld) instance may generate enough routine connection log activity to exhaust the storage backing the configured log path. When a log write or log rotation operation subsequently fails, the resulting error is not handled and the shared mongosqld process ends, ending service for all connected SQL clients. The process continues to end on startup until an operator restores available storage, and the diagnostic message explaining the condition is not recorded.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector
CVE-2026-81518

BI Connector Optional Client Certificate Verification Allows Unauthenticated Connections

When mongosqld is configured with a client certificate authority file, the listener requests a client certificate during the TLS handshake but does not require one, so a client that presents no certificate is still accepted. In deployments that rely on client certificates as the sole means of identifying users, a remote party with network access to the listener can therefore establish a session and read the MongoDB data exposed through the connector.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector
CVE-2026-81520

MongoDB Connector for BI Unbounded Authentication Negotiation Leading to Connection Exhaustion

A network-reachable client that has not yet authenticated can hold a MongoDB Connector for BI authentication session open indefinitely by beginning a SASL-based login exchange and then declining to complete it. Because the negotiation loop had no overall time bound and the read from the client had no deadline, each such session retains a worker, a client connection slot, and its associated backend database connections until the process is restarted. Repeated use of this behavior can consume the configured connection capacity and prevent legitimate users from establishing new sessions.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Bi Connector
CVE-2026-88022

Unauthorized document disclosure and deletion via query-operator injection in explicit equality filters in MongoDB integration for Laravel

Improper neutralization of special elements in data query logic in the MongoDB integration for Laravel can cause an array supplied to an explicit equality filter to be interpreted as a query condition rather than as a literal value. This affects the three-argument `where` method when the operator is `=` or `eq`, as well as the `find` and `delete` methods that use that code path. An attacker who can cause an affected application to supply an operator-shaped array to one of these APIs may obtain a document other than the intended target or delete documents beyond the intended target.

CVSS 4.0 · 8.4 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Laravel Mongodb Laravel Mongodb (php)
CVE-2026-88023

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB PHP Library

Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB PHP Library can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable. The affected rename operation may also rename a stored file other than the intended target.

CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Php Library
CVE-2026-88024

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB Rust Driver

Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB Rust Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable.

CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Rust-driver Rust Driver
CVE-2026-88025

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C# Driver

Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB C# Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable. The affected rename operation may also rename a stored file other than the intended target.

CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C# Driver C\# Driver
CVE-2026-88026

Regular expression injection via unescaped characters in LINQ query translation in MongoDB C# Driver

Improper neutralization of regular-expression metacharacters in the LINQ query translation component of the MongoDB C# Driver can cause a caller-supplied character sequence to alter a regular-expression predicate generated by an affected application. An authenticated user who can influence such a value may cause the application to return records beyond those intended by the original filter.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C# Driver C\# Driver
CVE-2026-88027

Mass deletion and overwrite of embedded documents via query-operator injection in embedded record keys in MongoDB integration for Laravel

Improper neutralization of special elements in data query logic in the embedded-document relation handling of the MongoDB integration for Laravel can cause a caller-supplied embedded record identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence such an identifier may delete all embedded documents in a targeted record or overwrite an embedded document other than the intended target.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Laravel Mongodb Laravel Mongodb (php)
CVE-2026-88028

Unauthorized document disclosure via query-operator injection in polymorphic relation identifiers in MongoDB integration for Laravel

Improper neutralization of special elements in data query logic in the polymorphic relation handling of the MongoDB integration for Laravel can cause a caller-supplied relation identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence a stored relation identifier may cause an affected application to return a document other than the intended relation target.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Laravel Mongodb Laravel Mongodb (php)
CVE-2026-88029

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB Python Driver

Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB Python Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable. The affected rename operation may also rename a stored file other than the intended target.

CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Python Driver
CVE-2026-88030

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB Ruby Driver

Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB Ruby Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable.

CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Ruby Driver
CVE-2026-88031

GridFS data deletion via query-operator injection in file IDs in the MongoDB Go Driver

Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB Go Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable.

CVSS 4.0 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Go Driver
CVE-2026-93394

libmongoc SCRAM client nonce-validation bypass

A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server's first message. An unauthorized party with a man-in-the-middle position could exploit this by injecting a crafted server-first-message containing a controlled salt and low iteration count, then capturing the resulting client proof to perform offline password cracking. This vulnerability is mitigated by TLS, which is standard in production deployments.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C Driver
CVE-2026-93395

Integer Underflow → Heap Out-of-Bounds Read in `bson_new_from_buffer()

A missing lower-bound validation in the bson_new_from_buffer() function of libbson allows an integer underflow when processing BSON data with a zero-length prefix. The function reads a 32-bit document length from the input buffer but does not verify that the value is at least 5 (the minimum valid BSON document size) before using it in an array index calculation. When the length field is zero, the expression used to check the document's null terminator wraps to UINT32_MAX, causing a heap out-of-bounds read that crashes the process. An unauthorized party who can supply crafted BSON input to an application using this API can cause a denial of service.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
C Driver
CVE-2026-18711

Use-After-Free in MongoDB Query Execution Engine Leads to Denial of Service and Potential Memory Disclosure

An issue in MongoDB Server's query execution engine could allow an authenticated user with read and write privileges to cause an internal reference to be used after the underlying memory has been freed, when running certain queries against time-series collections. This could result in a server crash or disclosure of freed memory contents within query results.

CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-18712

Improper Authorization in MongoDB Queryable Encryption Maintenance Operations Allows Unauthorized Modification of Other Collections

An issue in MongoDB Server's Queryable Encryption maintenance operations could allow an authenticated user with privileges on one encrypted collection to cause unauthorized modification or destruction of data belonging to a different collection. This is due to insufficient validation of certain internal metadata references before they are used to perform operations on other namespaces.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Mongodb Mongodb Server
CVE-2026-18710

Cleartext Storage of Sensitive Information in MongoDB Driver Logging During Client Initialization

A MongoDB driver component could write sensitive configuration information, including a credential used for outbound network connectivity, to application log output in cleartext during routine client initialization. This occurs automatically as part of normal operation and requires no special privileges to trigger. A party able to read the affected application's logs or downstream log-aggregation storage could recover the credential and reuse it to authenticate to the associated network infrastructure. This issue affects confidentiality only.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Mongodb
Products
Java Driver Mongodb Server