CVE-2026-53519

CRITICAL EPSS 36.0%

Published Jun 12, 20263w ago · Modified Jun 17, 20262w ago

9.1 CVSS 3.1

Critical

Published Jun 12, 2026 3w ago

Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score

9.1

Exploitability

3.9

Impact

5.2

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

36.0% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

References 1

github.com https://github.com/nezhahq/nezha/security/advisories/GHSA-5c25-7vpj-9mqh

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.