CVE-2026-9742

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...

CVE-2026-9746

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...

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...

UBUNTU-CVE-2026-9746

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...

UBUNTU-CVE-2026-9752

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...

CVE-2026-9742

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...

CVE-2026-9752

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...

CVE-2026-9746

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...

UBUNTU-CVE-2026-9742

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...

CVE-2026-46411

FlashMQ is the MQTT broker/server affected by CVE-2026-46411. The issue affects versions prior to 1.26.2, where an authorized client can exceed the permitted over-commit of their write buffer, triggering an internal safe-guard exception in a path that is not catchable and causing the server to ab...

CVE-2026-9740 Unbounded recursion in BSONColumn interleaved-reference causes pre-auth stack overflow

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,...

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-2026-9753 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-2026-9753 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...

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-2026-9753

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-2026-9752 GeometryCollection with strict-winding polygon causes server crash during 2dsphere index key generation

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...

CVE-2026-9752 GeometryCollection with strict-winding polygon causes server crash during 2dsphere index key generation

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...

CVE-2026-9752 GeometryCollection with strict-winding polygon causes server crash during 2dsphere index key generation

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...

CVE-2026-9752

MongoDB CVE-2026-9752 describes a vulnerability where an authorized user can trigger a server crash by executing a query that builds a 2dsphere index on a field containing a GeoJSON GeometryCollection with a Polygon that uses a strict-winding CRS. The underlying issue is that while strict-winding...