CVE-2026-9743 | THREATINT

Description

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.

PUBLISHED Reserved 2026-05-27 | Published 2026-06-09 | Updated 2026-06-10 | Assigner mongodb

HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-476 NULL pointer dereference

Product status

Default status

unaffected

8.0.0 (semver) before 8.0.24

affected

References

jira.mongodb.org/browse/SERVER-123688

cve.org (CVE-2026-9743)

nvd.nist.gov (CVE-2026-9743)

Download JSON