A size check in the client-side authentication path of the MongoDB C Driver can wrap around, so an unusually large user-name value is accepted and copied past the end of a small buffer. A party able to set the driver's connection settings may cause the application that embeds the driver to terminate unexpectedly. Reaching this code requires a build in which the optional external SASL authentication backend is present and a connection configured to use it.
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://jira.mongodb.org/browse/CDRIVER-6416 |
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History
Thu, 10 Sep 2026 19:30:00 +0000
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ssvc
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Thu, 10 Sep 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | A size check in the client-side authentication path of the MongoDB C Driver can wrap around, so an unusually large user-name value is accepted and copied past the end of a small buffer. A party able to set the driver's connection settings may cause the application that embeds the driver to terminate unexpectedly. Reaching this code requires a build in which the optional external SASL authentication backend is present and a connection configured to use it. | |
| Title | Heap buffer overflow via wrapped size check during SASL username canonicalization in MongoDB C Driver | |
| Weaknesses | CWE-190 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: mongodb
Published: 2026-09-10T18:07:10.823Z
Updated: 2026-09-10T18:29:53.256Z
Reserved: 2026-09-09T19:49:53.808Z
Link: CVE-2026-88035
Updated: 2026-09-10T18:29:45.428Z
Status : Awaiting Analysis
Published: 2026-09-10T19:17:40.953
Modified: 2026-09-10T19:44:21.980
Link: CVE-2026-88035
No data.