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CVE-2026-18420

🗓️ 20 Aug 2026 20:40:40Reported by AMZNType 
cve
 cve
🔗 web.nvd.nist.gov👁 35 Views

Prototype pollution in OpenSearch Dashboards TSVB plugin allows authenticated RCE via crafted JSON.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-18420
31 Jul 202621:00
circl
cvelist
Cvelist
CVE-2026-18420 RCE via Prototype Pollution in OpenSearch Dashboards
20 Aug 202620:40
cvelist
euvd
EUVD
EUVD-2026-63592
20 Aug 202620:40
euvd
nvd
NVD
CVE-2026-18420
20 Aug 202621:17
nvd
ptsecurity
Positive Technologies
PT-2026-79120
20 Aug 202600:00
ptsecurity
CNA
Node
[
  {
    "vendor": "AWS",
    "product": "Amazon OpenSearch Service",
    "versions": [
      {
        "status": "affected",
        "version": "3.0.0",
        "lessThan": "3.8.0",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "OpenSearch",
    "product": "OpenSearch Dashboards",
    "versions": [
      {
        "status": "affected",
        "version": "3.0.0",
        "lessThan": "3.8.0",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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20 Aug 2026 21:17Current
6.3Medium risk
Vulners AI Score6.3
CVSS 48.7
CVSS 3.18.8
EPSS0.00962
35