AUGUST 15, 2026
Live Feed
Back to database
Case File

CVE-2026-18691

HIGH · CVSS 8.8 EPSS 0.23%

Source: NVD + CISA KEV + EPSS · Published 2026-08-11 · Last synced 2026-08-15

CyberRota Analysis

AI-Generated

MongoDB Server is vulnerable due to a flaw in its intra-cluster connection setup, which may allow an attacker with network access to manipulate the authentication mechanism used between replica set members. This could lead to the exposure of shared internal credentials in a less-secure format, enabling unauthorized access as an internal superuser. Organizations utilizing MongoDB should prioritize addressing this vulnerability to safeguard their database environments against potential exploitation.

CVE
CVE-2026-18691
Severity
HIGH
CVSS
8.8
EPSS
0.23%
MongoDB

Original NVD Description

An issue in MongoDB Server's intra-cluster connection setup could allow a party with suitable network access to influence which authentication mechanism is used when one replica set member connects to another. Under certain conditions, this could cause the cluster's shared internal credential to be transmitted in a less-protected form, potentially allowing that credential to be recovered. If recovered, the credential could be used to authenticate as the internal superuser to nodes in the deployment.