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CVE-2026-81522: CWE-116: Improper Encoding or Escaping of Output in MongoDB C++ Driver

0
High
VulnerabilityCVE-2026-81522cvecve-2026-81522cwe-116
Published: 08/27/2026 (08/27/2026, 18:32:23 UTC)
Source: CVE Database V5
Vendor/Project: MongoDB
Product: C++ Driver

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.

CVSS v4.0

Score 8.6high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
None
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
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

Affected software

Affected versions
=3.0.0

Technical Details

Data Version
5.2
Assigner Short Name
mongodb
Date Reserved
2026-08-26T22:13:42.143Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a909cffacd9273b49b2d37c

Added to database: 08/27/2026, 20:24:31 UTC

Last updated: 08/28/2026, 02:37:15 UTC

Views: 8

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