CVE-2026-46716 Nezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cron
A low-privileged user can execute arbitrary shell commands on all monitored servers, including those of other tenants, via a crafted cron task.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-46716?
CVE-2026-46716 is a critical command injection vulnerability in nezhahq nezha, published on 12 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.8, a RoleMember user can create a scheduled cron task with Cover=CronCoverAll, Servers=[] and an arbitrary Command. At every tick of the scheduler, the dashboard pushes that command to every server in the global ServerShared map — including servers that belong to other tenants (admin's servers, other members' servers). Each agent runs the command and returns the output, which is then sent to the attacker's own NotificationGroup → attacker-controlled webhook. This issue has been patched in version 2.0.8.
Which versions are affected by CVE-2026-46716?
3 open source packages ship an affected version, including github.com/nezhahq/nezha.
| Package | Affected | Fixed in |
|---|---|---|
github.com/nezhahq/nezha Go | From 1.4.0 | 1.14.15-0.20260517022419-d7526351cf97 |
github.com/nezhahq/nezha Go | From 1.4.0 | 1.14.15-0.20260517022419-d7526351cf97 |
github.com/nezhahq/nezha Go | From 1.4.0 | 1.14.15-0.20260517022419-d7526351cf97 |
How do I fix CVE-2026-46716?
Upgrade github.com/nezhahq/nezha to 1.14.15-0.20260517022419-d7526351cf97 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-46716 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46716 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-99gv-2m7h-3hh9, GO-2026-5282.