A memory-initialization flaw in the legacy GridFS file handling of the MongoDB C Driver can cause uninitialized process memory to be treated as valid file content and stored on the server. A database user holding ordinary write access to a shared storage area can arrange conditions under which an application later appends to such a file and writes that memory into records the same user is permitted to read, which may result in unintended disclosure of sensitive information from the application's process, including credentials.
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Fixes

Solution

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Workaround

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History

Tue, 03 Nov 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 03 Nov 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Mongodb
Mongodb c Driver
Vendors & Products Mongodb
Mongodb c Driver

Tue, 03 Nov 2026 20:00:00 +0000

Type Values Removed Values Added
Title MongoDB C Driver 2.5.5 GridFS gap lets arotected client's password MongoDB C Driver GridFS gap lets a shared writer recover a protected client's password

Tue, 03 Nov 2026 19:00:00 +0000

Type Values Removed Values Added
Description A memory-initialization flaw in the legacy GridFS file handling of the MongoDB C Driver can cause uninitialized process memory to be treated as valid file content and stored on the server. A database user holding ordinary write access to a shared storage area can arrange conditions under which an application later appends to such a file and writes that memory into records the same user is permitted to read, which may result in unintended disclosure of sensitive information from the application's process, including credentials.
Title MongoDB C Driver 2.5.5 GridFS gap lets arotected client's password
Weaknesses CWE-908
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-11-03T20:11:10.303Z

Reserved: 2026-11-02T19:16:03.738Z

Link: CVE-2026-120684

cve-icon Vulnrichment

Updated: 2026-11-03T20:11:04.833Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-03T19:18:00.080

Modified: 2026-11-03T21:17:04.137

Link: CVE-2026-120684

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-03T20:45:01Z

Weaknesses