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.
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Fixes
Solution
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Workaround
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References
| Link | Providers |
|---|---|
| https://jira.mongodb.org/browse/SERVER-130264 |
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History
Tue, 11 Aug 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure | |
| Weaknesses | CWE-757 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: mongodb
Published:
Updated: 2026-08-11T20:22:00.933Z
Reserved: 2026-08-03T15:53:04.081Z
Link: CVE-2026-18691
No data.
Status : Received
Published: 2026-08-11T19:17:22.903
Modified: 2026-08-11T19:17:22.903
Link: CVE-2026-18691
No data.
OpenCVE Enrichment
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Weaknesses