vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2026-48552

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

MEDIUM
5.4
CVSS Score
Published: August 12, 2026 at 04:34 PM UTC
Updated: September 8, 2026 at 08:39 PM UTC
4 products affected across 2 vendorsNagios XINagios CoreNagios XI

Using Nagios Core by Nagios Enterprises, LLC.?

Get instant alerts when new vulnerabilities affect Nagios Core - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Nagios Core· Nagios
95%
v < 4.5.14
Affected range stops below 4.5.14, so it looks safe — our inference, not a vendor statement
Nagios XI· Nagios
95%
v < 2026r1.7
Affected range stops below 2026r1.7, so it looks safe — our inference, not a vendor statement
Nagios Core· Nagios Enterprises
60%
v < 4.5.14
Affected range stops below 4.5.14, so it looks safe — our inference, not a vendor statement
Nagios XI· Nagios Enterprises
60%
v < 2026R1.7
Affected range stops below 2026R1.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Vendor AdvisoryPatch
Source: cverecord
https://www.nagios.com/security-disclosures/nagios-core/
Release Notes
Source: cverecord
https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/nagios-core-xi-dom-based-xss-via-jsonquery-js

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card