CVE•Published 2026-08-20•Modified 2026-08-25•1 article on news•4 live references•NVD data
CVE-2026-18420
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
49
Exploit Prediction Scoring System · top 51% of all CVEs
Weaknesses (CWE)
Description
Improper input validation in the Time Series Visual Builder (TSVB) plugin in OpenSearch Dashboards allows an authenticated remote user to execute arbitrary code on the server via a crafted JSON payload to the metrics visualization API endpoint. This issue is a form of prototype pollution that enables remote code execution. To remediate this issue, users should upgrade to OpenSearch Dashboards 3.8 or later.
Timeline
Published 2026-08-20
Modified 2026-08-25
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-18420Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-18420Censys host search filtered to this CVE id.
grep.app
CVE-2026-18420Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-18420GitHub code search for direct mentions.
Google dork
"CVE-2026-18420" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-18420 on GitHub.