CVE-2026-18691

No fix known EPSS <1%CVSS 8.8

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.

Published 2026-08-11 · CVE record · OSV

Products: mongodb_server

Distro releases