A MongoDB C# driver document-replacement code path omits the element-name/shape validation that the equivalent write paths apply, so a value supplied as a replacement is forwarded to the server without neutralization of query-language special elements. An application that passes untrusted, loosely-typed input as a replacement value therefore allows that input to be interpreted by the database as update logic rather than as data, executing under the application's own database credentials. Applications using strongly-typed document mappings are not affected.
Advisories
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Fixes
Solution
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Workaround
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References
History
Fri, 28 Aug 2026 07:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mongodb
Mongodb c# Driver |
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| Vendors & Products |
Mongodb
Mongodb c# Driver |
Thu, 27 Aug 2026 18:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A MongoDB C# driver document-replacement code path omits the element-name/shape validation that the equivalent write paths apply, so a value supplied as a replacement is forwarded to the server without neutralization of query-language special elements. An application that passes untrusted, loosely-typed input as a replacement value therefore allows that input to be interpreted by the database as update logic rather than as data, executing under the application's own database credentials. Applications using strongly-typed document mappings are not affected. | |
| Title | NoSQL injection via array replacement bypassing update shape validation in driver write path | |
| Weaknesses | CWE-943 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: mongodb
Published:
Updated: 2026-08-27T22:34:51.114Z
Reserved: 2026-08-26T22:14:24.585Z
Link: CVE-2026-81528
No data.
Status : Received
Published: 2026-08-27T20:18:51.340
Modified: 2026-08-28T00:18:21.277
Link: CVE-2026-81528
No data.
OpenCVE Enrichment
Updated: 2026-08-28T07:30:07Z
Weaknesses