Unintended Proxy or Intermediary in MongoDB Server - CVE-2026-13062
Published: August 18, 2026
Vulnerability identifier: #VU144121
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-13062
CWE-ID: CWE-441
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to corrupt encrypted query correctness.
The vulnerability exists due to unintentional proxy or intermediary behavior in mongos when processing crafted write commands for Queryable Encryption-enabled collections on a sharded cluster. A remote user can send crafted write commands to corrupt encrypted query correctness.
The issue affects internal encryption metadata fields that are intended to be server-controlled.
Affected software
MongoDB Server
How to mitigate CVE-2026-13062
Install security update from vendor's website.
MongoDB Server - addressed in versions 7.0.39, 8.0.28, 8.2.12, 8.3.7