CVE-2026-81523
Cross-tenant database retargeting via dot/NUL injection in namespace strings in libmongocrypt
CVSS Score
4.4
EPSS Score
0.0%
EPSS Percentile
0th
A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selection, which may lead to limited disclosure or modification of information handled by the application.
| CWE | CWE-74 |
| Vendor | mongodb |
| Product | libmongocrypt |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 27, 2026 |
| Last Updated | Aug 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
MongoDB / libmongocrypt
1.0.0 < 1.20.3