SEPTEMBER 17, 2026
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Case File

CVE-2026-81528

MEDIUM · CVSS 5.4 EPSS 0.16%

Source: NVD + CISA KEV + EPSS · Published 2026-08-27 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The MongoDB C# driver is vulnerable due to a lack of element-name validation in its document-replacement code path, which allows untrusted input to be interpreted as executable update logic on the database. This can lead to unauthorized data manipulation under the application's database credentials, posing a risk to applications that handle loosely-typed input. Developers and organizations using the MongoDB C# driver should prioritize addressing this vulnerability, particularly if their applications do not implement strongly-typed document mappings.

CVE
CVE-2026-81528
Severity
MEDIUM
CVSS
5.4
EPSS
0.16%
MongoDB

Original NVD 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.