nezhahq nezha up to 2.0.12 NoRoute /data/config.yaml path traversal

Summaryinfo

A vulnerability classified as critical was found in nezhahq nezha up to 2.0.12. Affected is an unknown function of the file /data/config.yaml of the component NoRoute Handler. The manipulation results in path traversal. This vulnerability is identified as CVE-2026-53519. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in nezhahq nezha up to 2.0.12. Affected is an unknown function of the file /data/config.yaml of the component NoRoute Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-53519 since 06/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 2.0.13 eliminates this vulnerability.

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Productinfo

Vendor

• nezhahq

Name

• nezha

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8
• 2.0.9
• 2.0.10
• 2.0.11
• 2.0.12

Website

• Product: https://github.com/nezhahq/nezha/

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CPE 2.2info

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