CVE-2026-88035 Heap buffer overflow via wrapped size check during SASL username canonicalization in MongoDB C Driver

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...

CVE-2026-88035

CVE-2026-88035 is a heap buffer overflow in the MongoDB C Driver 's client-side authentication path, triggered during SASL username canonicalization . A size-check integer wrap-around allows an unusually large username to be copied past the end of a small buffer, causing the embedding application...