A weakness in the MongoDB C++ Driver's handling of caller-supplied namespace identifiers allows special characters embedded in those identifiers. An application that builds a namespace identifier from untrusted input without validating it may therefore have its operation directed at a different target than intended. This can result in limited unauthorized read and write access to data belonging to another logical tenant of the affected application.
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Fixes

Solution

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Workaround

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History

Sat, 29 Aug 2026 04:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Fri, 28 Aug 2026 07:45:00 +0000

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

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Description A weakness in the MongoDB C++ Driver's handling of caller-supplied namespace identifiers allows special characters embedded in those identifiers. An application that builds a namespace identifier from untrusted input without validating it may therefore have its operation directed at a different target than intended. This can result in limited unauthorized read and write access to data belonging to another logical tenant of the affected application.
Title Cross-tenant database retargeting via dot/NUL injection in namespace strings in the C++ Driver
Weaknesses CWE-116
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 8.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-08-29T03:55:54.810Z

Reserved: 2026-08-26T22:13:42.143Z

Link: CVE-2026-81522

cve-icon Vulnrichment

Updated: 2026-08-28T15:51:43.288Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-27T20:18:50.493

Modified: 2026-08-29T04:18:07.147

Link: CVE-2026-81522

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T15:30:08Z

Weaknesses