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.
Metrics
Affected Vendors & Products
References
History
Fri, 25 Sep 2026 12:15:00 +0000
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| Weaknesses | CWE-140 | |
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threat_severity
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threat_severity
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Fri, 25 Sep 2026 08:15:00 +0000
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Mongodb
Mongodb python Driver |
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Mongodb
Mongodb python Driver |
Thu, 24 Sep 2026 19:30:00 +0000
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ssvc
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Thu, 24 Sep 2026 18:30:00 +0000
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| Description | 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. | |
| Title | Connection redirection via percent-encoded delimiter injection in connection string hosts | |
| Weaknesses | CWE-177 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: mongodb
Published: 2026-09-24T18:18:12.032Z
Updated: 2026-09-24T19:12:05.362Z
Reserved: 2026-09-23T15:45:50.867Z
Link: CVE-2026-96748
Updated: 2026-09-24T18:36:33.745Z
Status : Awaiting Analysis
Published: 2026-09-24T19:17:20.813
Modified: 2026-09-24T21:00:46.893
Link: CVE-2026-96748