EUVD-2026-35865

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,...

CVE-2026-9747

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

CVE-2026-9753

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...

CVE-2026-9749

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,...

CVE-2026-9743

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 addres...

UBUNTU-CVE-2026-9749

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,...

UBUNTU-CVE-2026-9747

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

CVE-2026-9753

The vulnerability CVE-2026-9753 affects MongoDB’s aggregation pipeline via the internal stage $_internalApplyOplogUpdate. The issue allows an attacker with authenticated access to the aggregate command to pass a document diff containing a malformed binary diff, which can cause memory out-of-bound...

CVE-2026-9753 Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.

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...

CVE-2026-9749

The CVE-2026-9749 entry describes a bug in MongoDB where an aggregation pipeline using the internal $exchange stage with key-range partitioning and order-preserving delivery can cause a server crash. When a single key range produces many results that fill its exchange buffer, the code path detect...

CVE-2026-9749 Using MaxKey() may crash the server

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,...

CVE-2026-9749 Using MaxKey() may crash the server

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,...

Using MaxKey() may crash the server

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,...

CVE-2026-9747 Crafted cross-shard merge aggregation crashes MongoDB Server

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

CVE-2026-9747

The vulnerability CVE-2026-9747 affects MongoDB Server’s cross-shard merge aggregation. When building aggregations, using fromRouter:true with runtimeConstants.userRoles may cause the server to crash. The connected documentation confirms the issue but provides no details on mitigations; exploitat...

CVE-2026-9747 Crafted cross-shard merge aggregation crashes MongoDB Server

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

CVE-2026-9743

MongoDB Server 8.0 is affected by a vulnerability where an aggregation stage can leave its _subPipeline field null during processing. If a getMore is issued on the same cursor, the server may dereference the null sub-pipeline when reattaching to the operation context, leading to an invalid addres...

CVE-2026-9743 Aggregation sub-pipeline null dereference may allow DoS via crafted getMore

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 addres...

CVE-2026-9743 Aggregation sub-pipeline null dereference may allow DoS via crafted getMore

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 addres...

Aggregation sub-pipeline null dereference may allow DoS via crafted getMore

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 addres...