CVE-2026-1439 MEDIUM

CVE-2026-1439: Reflected Cross-Site Scripting (XSS) vulnerability in Graylog Web Interface

Vendor Graylog
Product Graylog Web Interface
Weakness CWE-79 · XSS
Published February 18, 2026
Last update February 18, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 18, 2026 CVE published
February 18, 2026 Record updated

Related vulnerabilities

04Related CVE