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