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CVE PROGRAM SOURCE RECORD7.1 High

CVE-2026-81529

Connection-option injection via unescaped settings in the canonical MongoDB URL builder

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

MongoDB C# Driver

Default version status: unaffected

  • 2.0.0 to < 3.11.1affected

References