CVE catalog
CVE-2026-18691
UBUNTU-CVE-2026-18691
- Severity
- Critical · CVSS 9
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.36% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | mongodb | pro | 1:2.4.6-0ubuntu5 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.4.6-0ubuntu6 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.4.8-1ubuntu1 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.4.8-2 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.4.9-1 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.4.9-1ubuntu1 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.4.9-1ubuntu2 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.4.9-1ubuntu2+esm2 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.6.10-0ubuntu1 | vulnerable |
| Ubuntu | mongodb | pro | 1:2.6.10-0ubuntu1+esm2 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.4.7-1 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.4.7-1ubuntu1 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.4.7-1ubuntu2 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.4.7-1ubuntu4 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.4.14-3ubuntu1 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.4.14-3ubuntu2 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.3-0ubuntu1 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.3-0ubuntu1.1 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.3-0ubuntu1.3 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.3-0ubuntu1.4 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.3-0ubuntu1.4+esm1 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.3-0ubuntu1.4+esm2 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu2 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.2 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3 | vulnerable |
| Ubuntu | mongodb | pro | 1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1 | vulnerable |
| Cpe | mongodb | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed: