Out-of-bounds read in MongoDB Server - CVE-2026-13077
Published: August 18, 2026
Vulnerability identifier: #VU144106
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-13077
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service or disclose sensitive information.
The vulnerability exists due to out-of-bounds read in the BSON CodeWScope element accessors when processing a crafted aggregation pipeline containing malformed BSONColumn data. A remote user can generate malformed BSONColumn data containing a CodeWScope element to cause a denial of service or disclose sensitive information.
The forged element bypasses wire-level BSON validation, and exploitation occurs when the element is decompressed and an unchecked size value is used in pointer arithmetic.
Affected software
MongoDB Server
How to mitigate CVE-2026-13077
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.39, 8.0.28, 8.2.12, 8.3.7