Cross-site scripting in Juniper Junos Space - CVE-2026-21904

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Main Vulnerability Database Vulnerabilities #VU130695

Cross-site scripting in Juniper Junos Space - CVE-2026-21904

Published: May 8, 2026


Vulnerability identifier: #VU130695
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-21904
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Juniper Networks, Inc.
Affected software:
Juniper Junos Space

Detailed vulnerability description

The vulnerability allows a remote attacker to execute commands with the target user's permissions.

The vulnerability exists due to cross-site scripting in the ilpFilter field on nLegacy.jsp when handling user-supplied input in the list filter field. A remote attacker can inject script tags to execute commands with the target user's permissions.


How to mitigate CVE-2026-21904

Install security update from vendor's website.

Sources