CVE-2026-53519
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. Prior to version 2.0.13, fallbackToFrontend in the dashboard's NoRoute handler treats any URL whose raw string starts with /dashboard as an admin-frontend asset request. The check uses strings.HasPrefix, not a path-segment match, so the input /dashboard../data/config.yaml is accepted; strings.TrimPrefix leaves ../data/config.yaml; and path.Join("admin-dist", "../data/config.yaml") normalizes to data/config.yaml — which os.Stat finds and http.ServeFile returns. No authentication required. This issue has been patched in version 2.0.13.
- Score
- CVSS 3.1 9.1 Critical
- Status
- Deferred - security-advisories@github.com
- Published
- 2026-06-12
- Last modified
- 2026-10-25
- Weaknesses
- CWE-22
Affected products
References
- https://github.com/nezhahq/nezha/security/advisories/GHSA-5c25-7vpj-9mqh
