CVE-2026-1440 — MEDIUM (6.1)

Vulnerability 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 '/system/pipelines/' endpoint.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Graylog	Graylog	2.2.3

Related Weaknesses (CWE)

CWE-79

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-grayThird Party Advisory

FAQ

What is CVE-2026-1440?

CVE-2026-1440 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 s...

How severe is CVE-2026-1440?

CVE-2026-1440 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-1440?

Check the references section above for vendor advisories and patch information. Affected products include: Graylog Graylog.