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CVE-2026-18691

🗓️ 11 Aug 2026 18:46:02Reported by mongodbType 
cve
 cve
🔗 web.nvd.nist.gov👁 70 Views

MongoDB intra-cluster auth negotiation flaw exposes internal cluster credential to network attackers.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-18691
11 Aug 202618:46
attackerkb
circl
Circl
CVE-2026-18691
13 Aug 202604:45
circl
cvelist
Cvelist
CVE-2026-18691 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
11 Aug 202618:46
cvelist
euvd
EUVD
EUVD-2026-56921
11 Aug 202618:46
euvd
mongodb
MongoDB
Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
11 Aug 202618:46
mongodb
nvd
NVD
CVE-2026-18691
11 Aug 202619:17
nvd
osv
OSV
UBUNTU-CVE-2026-18691
11 Aug 202619:17
osv
ptsecurity
Positive Technologies
PT-2026-70848
11 Aug 202600:00
ptsecurity
ubuntucve
UbuntuCve
CVE-2026-18691
11 Aug 202619:17
ubuntucve
nessus
Tenable Nessus
Linux Distros Unpatched Vulnerability : CVE-2026-18691
19 Aug 202600:00
nessus
Rows per page
[
  {
    "vendor": "MongoDB",
    "product": "MongoDB Server",
    "versions": [
      {
        "status": "affected",
        "version": "8.3.0",
        "lessThan": "8.3.8",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "8.0",
        "lessThan": "8.0.29",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "7.0",
        "lessThan": "7.0.40",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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28 Aug 2026 21:16Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.18.8
CVSS 49
EPSS0.00238
SSVC
70