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CVE-2026-18691

Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
MongoDB / MongoDB Serveraffected 8.3.0 before 8.3.8; affected 8.0 before 8.0.29; affected 7.0 before 7.0.40

CWE

CWE-757

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.