PT-2026-48291 · Mongodb · Mongodb Server

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-9743

Mitre

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-9743

Affected Products

Mongodb Server

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-9743 · Security Note
• https://jira.mongodb.org/browse/SERVER-123688 · Note