CVE-2026-81529
Connection-option injection via unescaped settings in the canonical MongoDB URL builder
- State
- Published
- Severity
- 7.1 High
- Published
- Aug 27, 2026
- Updated
- Aug 28, 2026
- Reserved
- Aug 26, 2026
Description
Improper neutralization of delimiters in connection-URL construction allows connection-option injection in the MongoDB C# Driver. When an application passes untrusted text into the driver's connection-URL builder and round-trips the builder back into a client configuration, the untrusted text is serialized without neutralizing the URL/option delimiters and is then re-parsed as authoritative connection options. A low-privileged user of such an application can thereby introduce or suppress security-relevant connection settings.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N | mongodb |
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N | mongodb |
Weaknesses
- CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Affected Products
| Product | Versions |
|---|---|
C# DriverMongoDB |
|
References
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