← Vulnerability feed

Vulnerability record · CVE-2026-4799 · published 31 March 2026

CVE-2026-4799: Search-guard flx open redirect vulnerability

Search Guard · Flx

In Search Guard FLX up to version 4.0.1, it is possible to use specially crafted requests to redirect the user to an untrusted URL.

4.3 CVSS 3.1 Medium EPSS 0.29% · top 80.4% CWE-601 · Open redirect
4.3CVSS 3.1 base score
0.29%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
24 Jul 2026Last modified by NVD

Description

In Search Guard FLX up to version 4.0.1, it is possible to use specially crafted requests to redirect the user to an untrusted URL.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://docs.search-guard.com/latest/changelog-searchguard-flx-4_1_0 Release Notes
https://search-guard.com/cve-advisory/ Vendor Advisory

Track CVE-2026-4799 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.1CVE-2026-4818Search-guard flx improper authorization vulnerabilityIn 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 manage…EPSS 0.33%6.5CVE-2026-4819Search-guard flx insufficiently protected credentials vulnerabilityIn 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.EPSS 0.36%4.7CVE-2012-0518Oracle Fusion Middleware SSO open redirect flawOracle Fusion Middleware 10.1.4.3.0 contains an unspecified open redirect vulnerability in the Application Server Single Sign-On component, tracked a…KEVEPSS 4.7%analysed6.1CVE-2021-38000Google Chrome Android Intents input validation open redirectChrome on Android before 95.0.4638.69 fails to properly validate untrusted input passed through Intents, allowing a crafted HTML page to redirect the…KEVEPSS 4.9%analysed

Source: NIST National Vulnerability Database (record CVE-2026-4799), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.