Vulnerability · Published Jun 12, 2026 · Assigned by GitHub_M
CVE-2026-53520Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing
Medium 6.5
In plain English
A medium-severity improper access control in nezha from nezhahq. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 72.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing. This issue has been patched in version 2.1.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/nezhahq/nezha | 2.1.0 | GHSA-x6fg-52vr-hj4w |
| Go | github.com/nezhahq/nezha | no fix listed | GO-2026-5824 |
Affected products (as reported)
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/nezhahq/nezha/security/advisories/GHSA-x6fg-52vr-hj4w x_refsource_CONFIRM