Improperly Controlled Sequential Memory Allocation in MongoDB Server - CVE-2026-8199
Published: August 18, 2026
Vulnerability identifier: #VU144153
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-8199
CWE-ID: CWE-1325
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improperly controlled sequential memory allocation in bitwise match expression AST processing when processing $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear expressions. A remote user can send crafted queries using these operators to cause a denial of service.
The issue can cause excess memory usage, contributing to memory pressure and potential out-of-memory conditions.
Affected software
MongoDB Server
How to mitigate CVE-2026-8199
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.34, 8.0.23, 8.2.9, 8.3.2