VULNERABILITY INTELLIGENCE

CVE-2026-81528

CVSS score5.4 MEDIUM
EPSS probability0.28%
CISA KEVNot currently listed
Published2026-08-27
Last modified2026-09-29
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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.

Weakness classification

  • cna@mongodb.com: CWE-943

Primary references