CVE-2026-49396 Nezha Monitoring: Cross-site GET request can trigger stored cron commands on a victim's agents
Cross-site request forgery allows attackers to trigger stored cron commands on victim agents, leading to potential code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-49396?
CVE-2026-49396 is a high-severity vulnerability in nezhahq nezha, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.0.0 to before version 2.0.14, cross-site GET request can trigger stored cron commands on a victim's agents. This issue has been patched in version 2.0.14.
Weakness: CWE-352
Which versions are affected by CVE-2026-49396?
3 open source packages ship an affected version, including github.com/nezhahq/nezha.
| Package | Affected | Fixed in |
|---|---|---|
github.com/nezhahq/nezha Go | From 1.0.0 | None |
github.com/nezhahq/nezha Go | From 1.0.0 | 2.0.14 |
github.com/nezhahq/nezha Go | From 1.0.0 | 2.0.14 |
How do I fix CVE-2026-49396?
Upgrade github.com/nezhahq/nezha to 2.0.14 or later.
Is CVE-2026-49396 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-49396 exists.
Sources
Also known as GHSA-8qhj-4f8c-j8qg, GO-2026-5261.