Missing Authorization in MongoDB Server - CVE-2026-6915
Published: May 4, 2026
Vulnerability identifier: #VU129564
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-6915
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to weaken another user's authentication configuration.
The vulnerability exists due to improper access control in the updateUser command when processing user update requests. A remote user can submit a crafted updateUser command to weaken another user's authentication configuration.
The issue allows downgrading any other user's authentication mechanism from SCRAM-SHA-256 to SCRAM-SHA-1.
Affected software
MongoDB Server
How to mitigate CVE-2026-6915
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.32, 8.0.21, 8.2.7