Home/CVE/In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary priv
CVE

CVE-2026-4818

In Search Guard FLX versions from 3.0.0 up to 4.0.1, there exists an issue which allows users without the necessary priv

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.

MEDIUM · CVSS 6.8 EPSS 0.00038
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-285Improper Authorization
CWE-862Missing Authorization
▤

Affected Products & Versions

1
search-guard flx>= 3.0.0 and < 4.1.0
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.1 · security@search-guard.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Mar 2026 · 04:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://docs.search-guard.com/latest/changelog-searchguard-flx-4_1_0Release Notes
https://search-guard.com/cve-advisory/Vendor Advisory
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