CVE-2026-114648
NoSQL injection via dot and dollar characters in LINQ filter field names and dictionary keys
The MongoDB C# Driver does not neutralize dot and dollar characters in dictionary keys, field names and array-filter identifiers used in LINQ queries before placing them into the field paths it sends to the server. An application user whose input reaches these positions can redirect a query or update to fields the application did not name, which can expose other users' documents and widen updates beyond the intended data. Certain values can also write malformed fields that leave stored documents unreadable by the application until they are repaired.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| C# Driver MongoDB |
≥ 2.14.0; < 3.13.0 (affected, semver)
Other versions: unaffected |
CNA: mongodb |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.2 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N | CNA: mongodb |
| 3.1 / 7.6 high |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H | CNA: mongodb |
Exploit evidence
- https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-2xqr-fxmx-2cmf
exploit · ADP: CISA-ADP
References
- https://jira.mongodb.org/browse/CSHARP-6181CNA: mongodb
- https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0CNA: mongodb
- https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-2xqr-fxmx-2cmfCNA: mongodb
- https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-2xqr-fxmx-2cmfADP: CISA-ADP · exploit