Description
A use-after-free weakness in MongoDB Server's server-side JavaScript support for aggregation may allow a stale reference to previously freed process memory to be read and returned. An authenticated user with minimal or no assigned roles can trigger this condition over the normal network protocol by submitting a single crafted aggregation request, with no additional privileges or non-default configuration. Successful triggering this issue may result in adjacent process memory contents being returned, including data that undermines memory-layout randomization, and may in some cases affect server availability.
Published: 2026-11-10
Score: 7.1 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Tue, 10 Nov 2026 20:30:00 +0000

Type Values Removed Values Added
Description A use-after-free weakness in MongoDB Server's server-side JavaScript support for aggregation may allow a stale reference to previously freed process memory to be read and returned. An authenticated user with minimal or no assigned roles can trigger this condition over the normal network protocol by submitting a single crafted aggregation request, with no additional privileges or non-default configuration. Successful triggering this issue may result in adjacent process memory contents being returned, including data that undermines memory-layout randomization, and may in some cases affect server availability.
Title Use-After-Free in MongoDB Server JavaScript Support for Aggregation Leads to Information Disclosure
Weaknesses CWE-416
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-11-10T20:16:01.719Z

Reserved: 2026-11-02T22:54:35.277Z

Link: CVE-2026-120818

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-10T21:19:00.283

Modified: 2026-11-10T21:19:00.283

Link: CVE-2026-120818

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses