CVE-2026-4799Network attack vector

Open redirect via crafted requests

Published Mar 31, 2026 · Updated Mar 31, 2026

Open redirect in the Search Guard Kibana plugin through Search Guard FLX 4.0.1 allows remote attackers to send users to untrusted URLs. Specially crafted requests supply an untrusted redirect destination, but floragunn has not disclosed the affected route, parameter, or validation failure. No authentication is required, but a user must interact with the crafted request; the reported consequence is limited to redirection and confidentiality exposure.

CVSS severity4.3
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in the Search Guard Kibana plugin through Search Guard FLX 4.0.1 allows remote attackers to send users to untrusted URLs. Specially crafted requests supply an untrusted redirect destination, but floragunn has not disclosed the affected route, parameter, or validation failure. No authentication is required, but a user must interact with the crafted request; the reported consequence is limited to redirection and confidentiality exposure.

The record

CVE
CVE-2026-4799
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
floragunn GmbH
Product
Search Guard FLX
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <=4.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

floragunn GmbH · Search Guard FLXversion=1.0.0 <=4.0.1

Published CVSS scores

4.3floragunn GmbHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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