CVE-2026-18691
CVE CVE-2026-18691EUVD EUVD-2026-56921Published 2026-08-11T18:46:02.000ZLast changed 2026-08-11T20:22:00.000ZCVSS 9.0
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- MongoDB, Inc. — MongoDB Server 8.3.0 <8.3.8; 8.0 <8.0.29; 7.0 <7.0.40
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- MongoDB — MongoDB Server
Does this concern one of your customers?
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