{"id":"CVE-2026-53519","sourceIdentifier":"security-advisories@github.com","published":"2026-06-12T22:16:51.953","lastModified":"2026-10-25T23:10:00.167","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"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."},{"lang":"es","value":"Nezha Monitoring es una herramienta autoalojable y ligera para el monitoreo de servidores y sitios web, y para O&M. Antes de la versión 2.0.13, fallbackToFrontend en el gestor NoRoute del panel de control trata cualquier URL cuya cadena de texto sin procesar comience con /dashboard como una solicitud de recurso del frontend de administración. La verificación utiliza strings.HasPrefix, no una coincidencia de segmento de ruta, por lo que la entrada /dashboard.. / data/config.yaml es aceptada; strings.TrimPrefix deja .. / data/config.yaml; y path.Join(“admin-dist”, “.. / data/config.yaml”) se normaliza a data/config.yaml - que os.Stat encuentra y http.ServeFile devuelve. No se requiere autenticación. Este problema ha sido parcheado en la versión 2.0.13."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"nezhahq","product":"nezha","versions":[{"version":"< 2.0.13","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","baseScore":9.1,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":5.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-15T18:26:37.174737Z","id":"CVE-2026-53519","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-22"}]}],"references":[{"url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-5c25-7vpj-9mqh","source":"security-advisories@github.com"}]}