CVE-2026-9743Aggregation sub-pipeline null dereference may allow DoS via crafted getMore
Updated under an hour ago ()
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It affects MongoDB server and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-476
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mongodb
- NVD analysis
- Analyzed
- Record last updated
- Jun 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
MongoDB MongoDB server mongodb:server (from the name) | from 8.0.0 before 8.0.24 | CNA record |
mongodb mongodb mongodb:mongodb | from 8.0.0 before 8.0.24 | NVD |
References
- https://jira.mongodb.org/browse/SERVER-123688vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.