PT-2026-20394 · Graylog · Graylog

Incibe · Published 2026-02-18 · Updated 2026-02-18 · CVE-2026-1438

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Graylog versions 2.2.3

Description A Reflected Cross-Site Scripting (XSS) issue exists in the Graylog Web Interface console. This is due to insufficient sanitization and escaping of HTML output. The issue allows an attacker to inject and execute arbitrary JavaScript code when a user visits a specially crafted URL. Exploitation may allow script execution in the victim’s browser and limited manipulation of the affected user’s session context. The /system/nodes/ endpoint is affected, as it includes segments of the URL directly in the response without applying output encoding.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-1438

Affected Products

Graylog

References · 4

• https://incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-1438 · Security Note
• https://osv.dev/vulnerability/CVE-2026-1438 · Vendor Advisory
• https://twitter.com/CVEnew/status/2024123164540706922 · Twitter Post