CVE-2026-4818

MEDIUMNVD 6.86.8—

6.8

In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary privileges to execute some management operations against data streams.

CVSS v3: 6.8
EG Score: 6.8(medium)
EPSS: 11.8%
KEV: Not listed

Published

March 31, 2026

Last Modified

April 3, 2026

References (2)

security@search-guardhttps://docs.search-guard.com/latest/changelog-searchguard-flx-4_1_0
security@search-guardhttps://search-guard.com/cve-advisory/

Data Freshness Timeline

(refreshed 12× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-21 22:43 UTCepss_batch
2026-05-20 22:38 UTCepss_batch
2026-05-20 19:47 UTCEG score recompute
2026-05-20 19:47 UTCGHSA enrichment
2026-05-20 11:22 UTCepss_batch

Frequently asked(5)

What is CVE-2026-4818?

CVE-2026-4818 is a medium vulnerability published on March 31, 2026. In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary privileges to execute some management operations against data streams.

When was CVE-2026-4818 disclosed?

CVE-2026-4818 was first published in the National Vulnerability Database on March 31, 2026, with the most recent update on April 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-4818 actively exploited?

CVE-2026-4818 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-4818?

CVE-2026-4818 has a CVSS v3 base score of 6.8 (NVD).

How do I remediate CVE-2026-4818?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-4818, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2026-4818

📅 Published

🔄 Last Modified

🔗 References (2)