What is the CVSS score of CVE-2026-1440?

CVE-2026-1440 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Graylog are affected by CVE-2026-1440?

CVE-2026-1440 presents moderate security risk, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

How to fix or mitigate CVE-2026-1440?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Graylog CVE-2026-1440

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-18 cve-coordination@incibe.es

XSS Graylog

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 18, 2026 - 14:16 nvd

MEDIUM 6.1

DescriptionCVE.org

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.

AnalysisAI

Reflected XSS in Graylog Web Interface version 2.2.3 fails to properly sanitize user-supplied input in the /system/pipelines/ endpoint, enabling attackers to inject malicious JavaScript through specially crafted URLs. An attacker can execute arbitrary scripts in a victim's browser and potentially hijack user sessions when the victim visits a malicious link. No patch is currently available for this vulnerability.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the Graylog Web component of Graylog. 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 manipulatio

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.