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CVE-2026-96748

Connection redirection via percent-encoded delimiter injection in connection string hosts PUBLISHED

Description (CNA)

PyMongo's connection string parsing decodes percent-encoded characters in the host portion before the host list is separated on its delimiters. When an application places a hostname value supplied by an unauthenticated party into a connection string, that party may cause additional servers of their choosing to be added to the application's database client. The application may then send its authentication exchange and database operations to one of those servers, which can observe limited information and return altered results.

Affected (CNA)

Vendor / productVersions
MongoDB / Python Driveraffected 0 before 4.18.2

CWE

CWE-177

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.