Integer underflow in MongoDB Server - CVE-2026-6914
Published: May 4, 2026
Vulnerability identifier: #VU129565
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-6914
CWE-ID: CWE-191
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer underflow in binDataClean() when computing the MD5 checksum of a malformed BSON object. A remote attacker can supply a malformed BSON object to cause a denial of service.
Affected software
MongoDB Server
How to mitigate CVE-2026-6914
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.32, 8.0.21, 8.2.7