CVE-2026-120684

MongoDB C Driver GridFS gap lets a shared writer recover a protected client's password

Published Nov 3, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
mongodb
Published
Updated
Nov 3, 2026, 8:11 PM
Reserved
Nov 2, 2026, 7:16 PM
Status
Awaiting Analysis
Published
Nov 3, 2026, 7:18 PM
Modified
Nov 3, 2026, 9:17 PM