CVE-2026-81529 — Connection-option injection via unescaped settings in the canonical MongoDB URL builder
Improper neutralization of delimiters in connection-URL construction allows connection-option injection in the MongoDB C# Driver. When an application passes untrusted text into …
Published: 2026-08-27 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7