CVE-2026-53519
CRITICAL 9.1EPSS 1.9%
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.
- CVSS v3.1
- 9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS v3.1
- 9.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS
- 1.93% chance of exploitation in the next 30 days, 79th percentile
- Nuclei
- critical · CWE-22
- Published
- 2026-06-12
- Updated
- 2026-06-15
Proof-of-concept exploits (2)
- advisories/GHSA-5c25-7vpj-9mqh
- tar-xz/CVE-2026-53519-PoC3★ · 2026-06-16