---
id: CVE-2026-84989
title: ntopng is a web-based network traffic monitoring application
summary: >-
  ntopng is a web-based network traffic monitoring application. In versions
  6.7.0 through 6.7.260717, two REST v2 endpoints that manage ntopng's tag/badge
  feature — `POST /lua/rest/v2/delete/tag/tag.lua` and `POST
  /lua/rest/v2/edit/tag/tag…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L'
cwe:
  - CWE-862
published: '2026-09-03'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:09:13.080'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84989'
references:
  - url: >-
      https://github.com/ntop/ntopng/commit/0e41f24b367fb9caf750459da67827326e3289e8
    label: security-advisories@github.com
  - url: 'https://github.com/ntop/ntopng/security/advisories/GHSA-43p9-5758-wwq8'
    label: security-advisories@github.com
  - url: 'https://github.com/ntop/ntopng/security/advisories/GHSA-43p9-5758-wwq8'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00383
epssPercentile: 0.29457
ingestedAt: '2026-09-09T21:22:45.565Z'
---

## Overview

ntopng is a web-based network traffic monitoring application. In versions 6.7.0 through 6.7.260717, two REST v2 endpoints that manage ntopng's tag/badge feature — `POST /lua/rest/v2/delete/tag/tag.lua` and `POST /lua/rest/v2/edit/tag/tag.lua` — perform no authorization check at all. Any authenticated user, including a non-administrator ("unprivileged") account, can delete or rename any tag in the system, including tags created by an administrator. Version 6.7.260718 contains a fix.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.