{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53519: Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53519","status":"final","version":"1","initial_release_date":"2026-06-12T21:03:48.844Z","current_release_date":"2026-06-12T21:03:48.844Z","revision_history":[{"date":"2026-06-12T21:03:48.844Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53519 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53519"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53519"},{"category":"external","summary":"https://github.com/nezhahq/nezha/security/advisories/GHSA-5c25-7vpj-9mqh","url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-5c25-7vpj-9mqh"}]},"product_tree":{"branches":[{"category":"vendor","name":"nezhahq","branches":[{"category":"product_name","name":"nezha","branches":[{"category":"product_version","name":"< 2.0.13","product":{"name":"nezhahq nezha < 2.0.13","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:nezhahq:nezha:\\<_2.0.13:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53519","title":"Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"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"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}