CVE-2026-9743

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Source
https://cve.org/CVERecord?id=CVE-2026-9743
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9743.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-9743
Aliases
Downstream
Published
2026-06-09T21:59:34.669Z
Modified
2026-07-15T01:49:10.198482964Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Aggregation sub-pipeline null dereference may allow DoS via crafted getMore
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9743.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "8.0.0"
                },
                {
                    "fixed": "8.0.24"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cna_assigner": "mongodb"
}
References

Affected packages

Git / github.com/mongodb/mongo

Affected ranges

Type
GIT
Repo
https://github.com/mongodb/mongo
Events
Introduced
b41cda4fe697dce6fd9b83b3805362ccc02fbeb3
Fixed
d0ad95914a3351a12faf03ba35d41c43bc6feb7e
Database specific 
{
    "cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "8.0.0"
        },
        {
            "fixed": "8.0.24"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

r8.*
r8.0.0
r8.0.1
r8.0.1-rc0
r8.0.10
r8.0.10-rc0
r8.0.12
r8.0.12-rc0
r8.0.13
r8.0.13-rc0
r8.0.13-rc1
r8.0.13-rc2
r8.0.14
r8.0.14-rc0
r8.0.14-rc1
r8.0.16
r8.0.16-rc0
r8.0.16-rc1
r8.0.17-alpha0
r8.0.2
r8.0.3
r8.0.4
r8.0.4-rc0
r8.0.5
r8.0.5-rc0
r8.0.5-rc1
r8.0.5-rc2
r8.0.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9743.json"