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Medium · 5.3 CVE-2026-1439 EUVD-2026-8070GHSA-49xw-73mm-8fw9

Reflected Cross-Site Scripting (XSS) vulnerability in Graylog Web Interface

Published Feb 18, 2026 · Updated Feb 18, 2026 · Assigned by INCIBE

Description

Reflected Cross-Site Scripting (XSS) vulnerability in the Graylog Web Interface console, version 2.2.3, caused by a lack of proper sanitization and escaping in HTML output. Several endpoints include segments of the URL directly in the response without applying output encoding, allowing an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitation of this vulnerability may allow script execution in the victim's browser and limited manipulation of the affected user's session context, through the  '/

alerts

/' endpoint.

Affected products

VendorProductAffectedFixed
Graylog Graylog Web Interface 2.2.3 —

Advisories 1

References