🛡️ CVE-2026-4799 — flx

🟡 CVSS 4.3 — Medium ✅ No Known Exploit CWE-601 NVD
4.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

Weakness class

CVE-2026-4799 is classified as CWE-601: Open Redirect. A redirect target is taken from user input, so a trusted link can send the visitor to an attacker's site.

Affected software

CVE-2026-4799 is recorded against 1 package.

  • flx (fixed in 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 4.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE CWE-601
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 — 4.1.0

Similar Threats

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