🛡️ CVE-2026-4819 — flx

🟡 CVSS 4.9 — Medium ✅ No Known Exploit CWE-522 NVD
4.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

In Search Guard FLX versions from 1.0.0 up to 4.0.1, the audit logging feature might log user credentials from users logging into Kibana.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-4819 is classified as CWE-522: Insufficiently Protected Credentials. Credentials are stored or transmitted with protection too weak for what they unlock.

Affected software

CVE-2026-4819 is recorded against 1 package.

  • flx (from 1.0.0 up to 4.1.0)

Timeline and source

Published on 31 March 2026 and last revised on 24 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

docs.search-guard.com
search-guard.com

Details

Severity MEDIUM
CVSS Score 4.9
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE CWE-522
Public Exploit ✅ No
Source NVD
Published 2026-03-31
Updated 2026-08-11
Modified 2026-07-24
Fix URL N/A

Affected Packages

Software From version Fixed in
flx 1.0.0 4.1.0

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