SB2026092468 - Out-of-bounds write in MongoDB driver for C

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-96746)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause the application using the driver to terminate unexpectedly.

The vulnerability exists due to an out-of-bounds write in the connection-monitoring logic when processing name-resolution results and responses from hosts named in a client's connection string. A remote attacker can control name resolution and responses from those hosts to cause the application using the driver to terminate unexpectedly.

Remediation

Install update from vendor's website.

References

• https://github.com/mongodb/mongo-c-driver/security/advisories/GHSA-frjf-h5jg-4v46
• https://jira.mongodb.org/browse/CDRIVER-6404