CVE-2026-6691
Published: May 6, 2026
Modified: May 7, 2026
CVSS v3.1
7.8
Description
The MongoDB C Driver's Cyrus SASL integration performs unsafe string copying during username canonicalization, enabling a heap buffer overflow before any authentication or network traffic. This may be triggered by passing untrusted input in the username of a MongoDB URI with authMechanism=GSSAPI.
| Vendor | Product | Versions |
|---|---|---|
MongoDB Inc. | MongoDB C Driver | affected 2.1.0 - <= 2.1.2 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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