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 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.
- Affected products
- Mongodb Server
- Mongodb
- < 8.0.24
- CVSS 4.0
- 7.1 HIGH
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 0.3% (23th percentile)
- Weakness
- CWE-476
- NVD status
- Analyzed
- Published
- 2026-06-09
CVE-2026-9743 at NVD
No indexed exploits for CVE-2026-9743 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-9743 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.