CVE-2026-81522Cross-tenant database retargeting via dot/NUL injection in namespace strings in the C++ Driver
Updated under an hour ago ()
Does this affect you?
It affects MongoDB C++ Driver. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-116
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mongodb
- NVD analysis
- Analyzed
- Record last updated
- Aug 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
MongoDB C++ Driver mongodb:c++_driver (from the name) | from 3.0.0 before 4.5.1 | CNA record |
mongodb c++_driver mongodb:c++_driver | from 3.0.0 before 4.5.2 | NVD |
References
- https://jira.mongodb.org/browse/CXX-3552vendor-advisory
- https://github.com/mongodb/mongo-cxx-driver/releases/tag/r4.5.1product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.