CVE-2026-40212

Severity CVSS v4.0:

Pending analysis

Type:

CWE-79 Cross-Site Scripting (XSS)

Publication date:

10/04/2026

Last modified:

13/04/2026

Description

OpenStack Skyline before 5.0.1, 6.0.0, and 7.0.0 has a DOM-based Cross-Site Scripting (XSS) vulnerability in the console because document.write is used unsafely, which is relevant in scenarios where administrators use the console web interface to view instance console logs.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.40 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): Required
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x

5.40

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

https://bugs.launchpad.net/skyline-console/+bug/2138575
https://review.opendev.org/973351
https://security.openstack.org/ossa/OSSA-2026-006.html
https://www.openwall.com/lists/oss-security/2026/04/09/30