CVE-2026-4799 Open redirect vulnerability in Search Guard Kibana Plugin via manipulated requests

Medium 4.3 Published 31 Mar 2026 Updated 31 Mar 2026

Attackers can redirect users to malicious sites via crafted requests in the Search Guard Kibana Plugin, potentially facilitating phishing attacks.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-4799?

CVE-2026-4799 is a medium-severity vulnerability in floragunn Search Guard FLX, published on 31 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-601

Which versions are affected by CVE-2026-4799?

It affects 1 product.

Products include Search-Guard Flx.

How do I fix CVE-2026-4799?

No fix has been published for CVE-2026-4799 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-4799 being exploited?

There is no known exploitation of CVE-2026-4799 in the wild and no public exploit code.

Sources

Also known as GHSA-mq38-9qw3-63h6.