MongoDB NoSQL Database

MongoDB JavaScript Engine UAF via BSON-to-Array
CVE-2026-11933 8.8 - High - June 12, 2026

A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.

Memory Corruption

MongoDB BSON Validator Recursion Crash (CVE20269740)
CVE-2026-9740 7.5 - High - June 09, 2026

A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.

Stack Exhaustion

MongoDB Server Exposes Auth Credentials in Logs During SASL Auth
CVE-2026-9735 5.5 - Medium - June 09, 2026

MongoDB server may log authentication parameters, including credentials, to the server log during SASL authentication. When connection health metric logging is enabled, the full authentication parameters are written to the log without redaction.

Insertion of Sensitive Information into Log File

MongoDB filemd5 LE: Authenticated Read Role Stack Memory Leak
CVE-2026-9754 6.5 - Medium - June 09, 2026

An authenticated user with the read role may read limited amounts of uninitialized stack memory via specially-crafted issuances of the filemd5 command

Use of Uninitialized Variable

MongoDB $_internalApplyOplogUpdate OOBB via malformed oplog diff
CVE-2026-9753 8.1 - High - June 09, 2026

The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authenticated user with access to the aggregate command.

Improper Validation of Specified Type of Input

MongoDB 2dsphere Crash via GeometryCollection NPE in GeoJSON
CVE-2026-9752 6.5 - Medium - June 09, 2026

An authorized user could trigger a server crash by running a query with a 2dsphere index on a field that stores a GeoJSON GeometryCollection containing a Polygon with a strict-winding CRS. Strict-winding polygons are intentionally unsupported for indexing, but the guard that rejects them does not inspect members of a GeometryCollection, allowing the unsafe path to be reached which ends with an ensuing null-pointer dereference.

NULL Pointer Dereference

Plain Text Password Logging via ldapQueryPassword in MongoDB
CVE-2026-9751 5.5 - Medium - June 09, 2026

The ldapQueryPassword parameter, when set through the runtime setParameter command, will log the new password to the mongod.log file in plain text.

Insertion of Sensitive Information into Log File

MongoDB Internal Metadata Injection Crash Vulnerability
CVE-2026-9750 6.5 - Medium - June 09, 2026

An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.

assertion failure

MongoDB $exchange Stage Buffer Update Failure Enables DoS
CVE-2026-9749 6.5 - Medium - June 09, 2026

This issue can occur when running an aggregation pipeline that uses the internal $exchange stage configured with key-range partitioning and order-preserving delivery. If a single key range produces enough documents to fill its exchange buffer (that is, many results are routed to the same consumer), the server reaches the code path where a full per-consumer buffer is detected but the internal "high watermark" for that key range is not updated as intended.

assertion failure

MongoDB $facet Crash via PauseExecution misuse in aggregation pipeline
CVE-2026-9748 6.5 - Medium - June 09, 2026

The $_internalConvertBucketIndexStats stage used PauseExecution as a way to signal "skip this document" when an index stats conversion failed. But PauseExecution is not a general purpose skip mechanism, but rather a TeeBuffer-internal signal used solely by $facet to coordinate its sub-pipelines. When this stage is placed before $facet in a pipeline, TeeBuffer receives the unexpected PauseExecution from upstream and hits a hard invariant assertion, crashing mongod.

assertion failure

MongoDB Crash via fromRouter:true and userRoles Aggregation Bug
CVE-2026-9747 6.5 - Medium - June 09, 2026

Adding fromRouter:true and runtimeConstants.userRoles could cause aggregations to crash mongodb server.

assertion failure

MongoDB Crash via $_requestReshardingResumeToken (Change Streams)
CVE-2026-9746 6.5 - Medium - June 09, 2026

When using $changestreams and $_requestReshardingResumeToken with the exchange option the server hits an invariant which causes the server to crash. There are no special privileges needed. The user must be logged in to issue the statement.

assertion failure

MongoDB 8.0 Aggregation Null _subPipeline Causing DoS
CVE-2026-9743 6.5 - Medium - June 09, 2026

In MongoDB Server 8.0, an aggregation stage can leave its _subPipeline field null during processing of certain pipelines. If a getMore is subsequently issued on the same cursor, the server may dereference this null sub-pipeline when reattaching to the operation context, accessing an invalid address and crashing the process. This issue allows an authenticated user who can run aggregation pipelines to cause a denial of service by issuing a specially crafted aggregation followed by getMore on affected versions.

NULL Pointer Dereference

MongoDB OIDC Pre-Auth DoS via 'mechanism' param
CVE-2026-9742 7.5 - High - June 09, 2026

When OIDC authentication is enabled in configuration, clients may set specific values in the "mechanism" parameter of the "authenticate" command that lead to server crash. The authenticate command is accessible to unauthenticated clients, leading to pre-auth denial-of-service in affected product configurations.

Improper Validation of Specified Type of Input

MongoDB QE $vectorSearch Stage Plaintext Leak
CVE-2026-9741 6.5 - Medium - June 09, 2026

A bug in query analysis processing of the $vectorSearch aggregation stage for Queryable Encryption (QE) or Client-Side Field Level Encryption (CSFLE) results in literal values for encrypted fields within the $vectorSearch stage filter expressions to be sent to the server as plaintext instead of ciphertext.

Cleartext Transmission of Sensitive Information

MongoDB 7.0 (pre-7.0.32) | 2dsphere_bucket Index Crash on Non-TS Buckets
CVE-2026-8843 6.5 - Medium - May 18, 2026

Creating a "2dsphere_bucket" index on a non-timeseries bucket collection will succeed, but any subsequent attempt to insert a document which triggers updating that index will crash the server. A similar issue occurs when creating "queryable_encrypted_range" indices. This issue affects MongoDB Server v7.0 versions prior to 7.0.32, v8.0 versions prior to 8.0.21 and v8.2 versions prior to 8.2.6

assertion failure

DoS via $trim/$ltrim/$rtrim in MongoDB 7.0-8.3 (pre 7.0.34, 8.0.23, 8.2.9, 8.3.2)
CVE-2026-8202 4.3 - Medium - May 13, 2026

Using a densely populated chars mask and a large input string in the MongoDB aggregation operators $trim, $ltrim, and $rtrim, an authenticated user with aggregation permissions can pin CPU utilization at 100% for an extended period of time. This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Allocation of Resources Without Limits or Throttling

MongoDB Server <7.0.34/8.0.23/8.2.9/8.3.2: Auth DoS via _internalJsEmit
CVE-2026-8336 7.5 - High - May 13, 2026

After invoking $_internalJsEmit, which is not intended to be directly accessible, or mapreduce commands map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service. This issue impacts MongoDB Server v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Dangling pointer

Use-After-Free in MongoDB mongocryptd FLE query (v7.0<7.0.34/8.0<8.0.23)
CVE-2026-8201 6.4 - Medium - May 13, 2026

A use-after-free vulnerability exists in MongoDB's Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and crypt_shared. Triggering this vulnerability requires control over the structure of a client's FLE-related query. This issue impacts MongoDB Servers mongocryptd component v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Dangling pointer

MongoDB Server 7.0 log message data leak via schema validation prior to 7.0.34
CVE-2026-8200 2.7 - Low - May 13, 2026

When schema validation is enabled on a collection and an update or insert would violate the collection's schema, the local server log message generated may not have all user data redacted.  This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Insertion of Sensitive Information into Log File

MongoDB Server OOM via Bitwise Expr AST (7.0.33,8.0.22,8.2.8,8.3.1)
CVE-2026-8199 6.5 - Medium - May 13, 2026

An authenticated user can cause excess memory usage via bitwise match expression AST processing of $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear. This contributes to memory pressure and may lead to availability loss by OOM. This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Stack Exhaustion

MongoDB Server <=8.3.2 OOB EDR via TimeSeries Bucket Catalog
CVE-2026-8053 8.8 - High - May 12, 2026

An issue in MongoDB Server's time-series collection implementation allows an authenticated user with database write privileges to trigger an out-of-bounds memory write in the mongod process. The issue results from an inconsistency in the internal field-name-to-index mapping within the time-series bucket catalog. Under certain conditions this can result in arbitrary code execution. This issue impacts MongoDB Server v5.0 versions prior to 5.0.33, v6.0 versions prior to 6.0.28, v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Memory Corruption

Atlas Search $rankFusion/$scoreFusion Null Ptr Crash (MongoDB 8.2<8.2.7)
CVE-2026-8063 6.5 - Medium - May 07, 2026

An authenticated user can crash mongod when running $rankFusion or $scoreFusion with an empty pipeline on a view. When resolving a view, the server inspects the aggregation pipeline to determine whether it begins with an Atlas Search stage. For $rankFusion and $scoreFusion, this inspection reads the first element on each stages input pipeline array without first verifying that the array is non-empty. Supplying an empty pipeline causes a null pointer dereference and crashes the server. This issue affects MongoDB Server 8.2 versions prior to 8.2.7.

NULL Pointer Dereference

MongoDB Auth Flaw: Auth'd User Can Alter Another User's Auth Data
CVE-2026-6915 6.3 - Medium - April 29, 2026

An authorization flaw in the user management command could allow an authenticated user to make limited changes to authentication-related data associated with another user account. This could affect how authentication is performed for the impacted account.

Improper Validation of Specified Quantity in Input

MongoDB Server v7-8.2 DoS via MD5 on Malformed BSON
CVE-2026-6914 6.5 - Medium - April 29, 2026

Computing the MD5 checksum of a malformed BSON object under specific conditions may cause loss of availability in MongoDB server. This issue affects all MongoDB Server v8.2 versions, all MongoDB Server v8.1 versions, MongoDB Server v8.0 versions prior to 8.0.21, MongoDB Server v7.0 versions prior to 7.0.32

Integer underflow

MongoDB Server <=8.2.2 DDoS: mongod Crash during Replica Set Promotion
CVE-2026-5170 5.3 - Medium - March 30, 2026

A user with access to the cluster with a limited set of privilege actions can trigger a crash of a mongod process during the limited and unpredictable window when the cluster is being promoted from a replica set to a sharded cluster. This may cause a denial of service by taking down the primary of the replica set. This issue affects MongoDB Server v8.2 versions prior to 8.2.2, MongoDB Server v8.0 versions between 8.0.18, MongoDB Server v7.0 versions between 7.0.31.

assertion failure

MongoDB SBE: $lookup Auth Query Can Trigger Double-Free/UAF
CVE-2026-4358 6.4 - Medium - March 17, 2026

A specially crafted aggregation query with $lookup by an authenticated user with write privileges can cause a double-free or use-after-free memory issue in the slot-based execution (SBE) engine when an in-memory hash table is spilled to disk.

Double-free

UAF in MongoDB $lookup Aggregation Pipeline
CVE-2026-4148 8.8 - High - March 17, 2026

A use-after-free vulnerability can be triggered in sharded clusters by an authenticated user with the read role who issues a specially crafted $lookup or $graphLookup aggregation pipeline.

Dangling pointer

MongoDB: FileMD5 Command Allows Authenticated Read of Uninitialized Stack Memory
CVE-2026-4147 6.5 - Medium - March 17, 2026

An authenticated user with the read role may read limited amounts of uninitialized stack memory via specially-crafted issuances of the filemd5 command.

Use of Uninitialized Variable

Mongoid::Criteria.from_hash allows ARB Ruby code exec via crafted Hash
CVE-2026-2302 6.5 - Medium - February 10, 2026

Under specific conditions when processing a maliciously crafted value of type Hash r, Mongoid::Criteria.from_hash may allow for executing arbitrary Ruby code.

Allowlist / Allow List

MongoDB Crash via Invalid Compound Wildcard Index
CVE-2026-25613 6.5 - Medium - February 10, 2026

An authorized user may disable the MongoDB server by issuing a query against a collection that contains an invalid compound wildcard index.

Incorrect Type Conversion or Cast

MongoDB Server OOM via deep nested expression evaluation
CVE-2026-1849 6.5 - Medium - February 10, 2026

MongoDB Server may experience an out-of-memory failure while evaluating expressions that produce deeply nested documents. The issue arises in recursive functions because the server does not periodically check the depth of the expression.

Stack Exhaustion

MongoDB Query Planner OOM via Complex Queries
CVE-2026-1850 6.5 - Medium - February 10, 2026

Complex queries can cause excessive memory usage in MongoDB Query Planner resulting in an Out-Of-Memory Crash.

Allocation of Resources Without Limits or Throttling

Profile cmd validation flaw enables readonly misclassification (CVE202625609)
CVE-2026-25609 5.4 - Medium - February 10, 2026

Incorrect validation of the profile command may result in the determination that a request altering the 'filter' is read-only.

AuthZ

MongoDB Server Crash via $geoNear Pipeline Index Hints
CVE-2026-25610 6.5 - Medium - February 10, 2026

An authorized user may trigger a server crash by running a $geoNear pipeline with certain invalid index hints.

assertion failure

MongoDB: proxy_protocol header miscount leads to server crash
CVE-2026-1848 7.5 - High - February 10, 2026

Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header.

Allocation of Resources Without Limits or Throttling

MongoDB Replica Set Oplog Fetch Failure Causing Crash
CVE-2026-1847 6.5 - Medium - February 10, 2026

Inserting certain large documents into a replica set could lead to replica set secondaries not being able to fetch the oplog from the primary. This could stall replication inside the replica set leading to server crash.

Allocation of Resources Without Limits or Throttling

MongoDB Server Lock Collision Unavailability Vulnerability
CVE-2026-25612 6.5 - Medium - February 10, 2026

The internal locking mechanism of the MongoDB server uses an internal encoding of the resources in order to choose what lock to take. Collections may inadvertently collide with one another in this representation causing unavailability between them due to conflicting locks.

Unrestricted Externally Accessible Lock

MongoDB Server Memory Exhaustion via Unauthenticated Messages
CVE-2026-25611 7.5 - High - February 10, 2026

A series of specifically crafted, unauthenticated messages can exhaust available memory and crash a MongoDB server.

Amplification

MongoDB Server Uninit Heap Read via Zlib Header Len Mismatch <4.2.0
CVE-2025-14847 7.5 - High - December 19, 2025

Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions prior to 8.2.3, MongoDB Server v6.0 versions prior to 6.0.27, MongoDB Server v5.0 versions prior to 5.0.32, MongoDB Server v4.4 versions prior to 4.4.30, MongoDB Server v4.2 versions greater than or equal to 4.2.0, MongoDB Server v4.0 versions greater than or equal to 4.0.0, and MongoDB Server v3.6 versions greater than or equal to 3.6.0.

length manipulation

MongoDB Server 7.0/8.0/8.2 Before x.x: Post-Auth Tx Commit Flaw
CVE-2025-14345 4.2 - Medium - December 09, 2025

A post-authentication flaw in the network two-phase commit protocol used for cross-shard transactions in MongoDB Server may lead to logical data inconsistencies under specific conditions which are not predictable and exist for a very short period of time. This error can cause the transaction coordination logic to misinterpret the transaction as committed, resulting in inconsistent state on those shards. This may lead to low integrity and availability impact. This issue impacts MongoDB Server v8.0 versions prior to 8.0.16, MongoDB Server v7.0 versions prior to 7.0.26 and MongoDB server v8.2 versions prior to 8.2.2.

Improper Locking

MongoDB invariant failure in batched delete (v7.0<26, v8.0<13, v8.1<2)
CVE-2025-13644 6.5 - Medium - November 25, 2025

MongoDB Server may experience an invariant failure during batched delete operations when handling documents. The issue arises when the server mistakenly assumes the presence of multiple documents in a batch based solely on document size exceeding BSONObjMaxSize. This issue affects MongoDB Server v7.0 versions prior to 7.0.26, MongoDB Server v8.0 versions prior to 8.0.13, and MongoDB Server v8.1 versions prior to 8.1.2

assertion failure

MongoDB Denial-of-Service via Query Termination Privileges before 7.0.26/8.0.14
CVE-2025-13643 3.1 - Low - November 25, 2025

A user with access to the cluster with a limited set of privilege actions may be able to terminate queries that are being executed by other users. This may cause a denial of service by preventing a fraction of queries from successfully completing. This issue affects MongoDB Server v7.0 versions prior to 7.0.26 and MongoDB Server v8.0 versions prior to 8.0.14

AuthZ

TLS EKU Bypass CVE-2025-12893: MongoDB Server v7.0/8.0/8.2 Pre-Fix
CVE-2025-12893 4.2 - Medium - November 25, 2025

Clients may successfully perform a TLS handshake with a MongoDB server despite presenting a client certificate not aligning with the documented Extended Key Usage (EKU) requirements. A certificate that specifies extendedKeyUsage but is missing extendedKeyUsage = clientAuth may still be successfully authenticated via the TLS handshake as a client. This issue is specific to MongoDB servers running on Windows or Apple as the expected validation behavior functions correctly on Linux systems. Additionally, MongoDB servers may successfully establish egress TLS connections with servers that present server certificates not aligning with the documented Extended Key Usage (EKU) requirements. A certificate that specifies extendedKeyUsage but is missing extendedKeyUsage = serverAuth may still be successfully authenticated via the TLS handshake as a server. This issue is specific to MongoDB servers running on Apple as the expected validation behavior functions correctly on both Linux and Windows systems. This vulnerability affects MongoDB Server v7.0 versions prior to 7.0.26, MongoDB Server v8.0 versions prior to 8.0.16 and MongoDB Server v8.2 versions prior to 8.2.2

Improper Certificate Validation

MongoDB Server <=7.0.26/8.0.16/8.2.1: Timeseries Oversized BSON Crash
CVE-2025-13507 6.5 - Medium - November 25, 2025

Inconsistent object size validation in time series processing logic may result in later processing of oversized BSON documents leading to an assert failing and process termination. This issue impacts MongoDB Server v7.0 versions prior to 7.0.26, v8.0 versions prior to 8.0.16 and MongoDB server v8.2 versions prior to 8.2.1.

Improper Validation of Specified Quantity in Input

MongoDB KMIP Parser Tolerant to Malformed Packets Causing Read Access Violation
CVE-2025-12657 5 - Medium - November 03, 2025

The KMIP response parser built into mongo binaries is overly tolerant of certain malformed packets, and may parse them into invalid objects. Later reads of this object can result in read access violations.

Improper Check for Unusual or Exceptional Conditions

MongoDB Server v7.0 Xbefore 7.0.25: Buffer Overread Crash by Authorized User
CVE-2025-11979 5.3 - Medium - October 20, 2025

An authorized user may crash the MongoDB server by causing buffer over-read. This can be done by issuing a DDL operation while queries are being issued, under some conditions. This issue affects MongoDB Server v7.0 versions prior to 7.0.25, MongoDB Server v8.0 versions prior to 8.0.15, and MongoDB Server version 8.2.0.

Dangling pointer

MongoDB Connector for BI MSI ACL Misconfig PrivEsc (2.0.0-2.14.24)
CVE-2025-11535 - October 08, 2025

MongoDB Connector for BI installation via MSI on Windows leaves ACLs unset on custom install directories allows Privilege Escalation.This issue affects MongoDB Connector for BI: from 2.0.0 through 2.14.24.

Incorrect Default Permissions

DLL Hijack via ACL Misconfig in MongoDB <6.0.25 / <7.0.21 / <8.0.5 (Windows MSI)
CVE-2025-10491 7.8 - High - September 15, 2025

The MongoDB Windows installation MSI may leave ACLs unset on custom installation directories allowing a local attacker to introduce executable code to MongoDB's process via DLL hijacking. This issue affects MongoDB Server v6.0 version prior to 6.0.25, MongoDB Server v7.0 version prior to 7.0.21 and MongoDB Server v8.0 version prior to 8.0.5

Authorization

MongoDB 8.1 Duplicate _id Queries Causing Crash (DOS)
CVE-2025-7259 - July 07, 2025

An authorized user can issue queries with duplicate _id fields, that leads to unexpected behavior in MongoDB Server, which may result to crash. This issue can only be triggered by authorized users and cause Denial of Service. This issue affects MongoDB Server v8.1 version 8.1.0.