Vulnerability · Published Feb 18, 2026 · Assigned by INCIBE
CVE-2026-1439Reflected Cross-Site Scripting (XSS) vulnerability in Graylog Web Interface
Medium 5.3
In plain English
A medium-severity cross-site scripting in Graylog Web Interface from Graylog. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Graylog | Graylog Web Interface | 2.2.3 |
Weakness: CWE-79 · 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