CVE-2026-48552

Nagios Core / XI DOM-based XSS via jsonquery.js

Published Aug 12, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4832-1 nagios4 security update
Debian DSA Debian DSA DSA-6556-1 nagios4 security update
History
Type Values Removed Values Added
CPEs cpe:2.3:a:nagios:nagios_core:*:*:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Nagios
Nagios nagios Core
Nagios nagios Xi
Vendors & Products Nagios
Nagios nagios Core
Nagios nagios Xi
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.
Title Nagios Core / XI DOM-based XSS via jsonquery.js
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Aug 14, 2026, 4:49 PM
Reserved
May 21, 2026, 6:34 PM
Status
Awaiting Analysis
Published
Aug 12, 2026, 5:17 PM
Modified
Sep 8, 2026, 8:28 PM