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CVE-2026-18420 RCE via Prototype Pollution in OpenSearch Dashboards

🗓️ 20 Aug 2026 20:40:40Reported by AMZNType 
cvelist
 cvelist
🔗 www.cve.org👁 7 Views

Authenticated RCE via prototype pollution in TSVB plugin of OpenSearch Dashboards. Upgrade to 3.8+.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-18420
31 Jul 202621:00
circl
cve
CVE
CVE-2026-18420
20 Aug 202620:40
cve
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
[
  {
    "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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