floragunn Search Guard FLX up to 4.0.1 URL redirect

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.17

Summaryinfo

A vulnerability has been found in floragunn Search Guard FLX up to 4.0.1 and classified as problematic. The impacted element is an unknown function of the component URL Handler. This manipulation causes redirect. This vulnerability is tracked as CVE-2026-4799. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in floragunn Search Guard FLX up to 4.0.1. It has been declared as problematic. Affected by this vulnerability is an unknown part of the component URL Handler. The manipulation with an unknown input leads to a redirect vulnerability. The CWE definition for the vulnerability is CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. As an impact it is known to affect integrity. The summary by CVE is:

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.

It is possible to read the advisory at search-guard.com. This vulnerability is known as CVE-2026-4799 since 03/25/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1204.001 according to MITRE ATT&CK.

Upgrading to version 4.1.0 eliminates this vulnerability. The upgrade is hosted for download at docs.search-guard.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-17474). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (floragunn): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Redirect
CWE: CWE-601
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Search Guard FLX 4.1.0

Timelineinfo

03/25/2026 CVE reserved
03/31/2026 +5 days Advisory disclosed
03/31/2026 +0 days VulDB entry created
03/31/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: search-guard.com
Status: Confirmed

CVE: CVE-2026-4799 (🔒)
GCVE (CVE): GCVE-0-2026-4799
GCVE (VulDB): GCVE-100-354427
EUVD: 🔒

Entryinfo

Created: 03/31/2026 17:58
Updated: 03/31/2026 18:45
Changes: 03/31/2026 17:58 (65), 03/31/2026 18:45 (1)
Complete: 🔍
Cache ID: 216:574:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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