CVE-2026-53523 Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.0.0 to before version 2.2.0, the getRedirectURL function in oauth2.go:22-29 constructs the OAuth2 callback URL by concatenating the request's Host header with a fixed path, with zero...

CVE-2026-53522 Nezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoS

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.0.0 to before version 2.2.0, the Nezha dashboard exposes two endpoints that create long-lived WebSocket streams to monitored agents: POST /api/v1/terminal → createTerminal...

CVE-2026-53522 Nezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoS

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.0.0 to before version 2.2.0, the Nezha dashboard exposes two endpoints that create long-lived WebSocket streams to monitored agents: POST /api/v1/terminal → createTerminal...

CVE-2026-53522 Nezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoS

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.0.0 to before version 2.2.0, the Nezha dashboard exposes two endpoints that create long-lived WebSocket streams to monitored agents: POST /api/v1/terminal → createTerminal...

CVE-2026-53522

Summary: Nezha Monitoring (versions 1.0.0–before 2.2.0) exposes two endpoints that create long-lived WebSocket streams, allowing resource exhaustion due to unbounded per-stream tracking. The endpoints are POST /api/v1/terminal (terminal.go) and POST /api/v1/file (fm.go), which call CreateStream t...

CVE-2026-53521 Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, PATCH /server/id accepts and persists nonexistent ddnsprofiles IDs for a member-owned server. If another user later creates a DDNS profile with one of those...

CVE-2026-53521 Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, PATCH /server/id accepts and persists nonexistent ddnsprofiles IDs for a member-owned server. If another user later creates a DDNS profile with one of those...

CVE-2026-53521

CVE-2026-53521 affects Nezha Monitoring. From versions 2.0.14 up to before 2.1.0, PATCH /server/{id} accepts and persists nonexistent ddns_profiles IDs for a member-owned server. If another user later creates a DDNS profile with one of those IDs, the DDNS worker resolves the stored ID and dispatc...

CVE-2026-53520 Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing. This issue has been patched in version 2.1.0...

CVE-2026-53520

Nezha Monitoring before 2.1.0 (vulnerable 2.0.14–pre-2.1.0) allows authenticated users to claim the dashboard Host via NAT and preempt all dashboard routing. CVSS 3.1 base score 6.5 (I: None, A: High). Patch: upgrade to 2.1.0. If upgrading is not feasible, apply the vendor advisory guidance from ...

CVE-2026-53520 Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing. This issue has been patched in version 2.1.0...

CVE-2026-53520 Nezha Monitoring: Authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing. This issue has been patched in version 2.1.0...

CVE-2026-53519 Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key

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.HasPrefi...

CVE-2026-53519 Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key

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.HasPrefi...

CVE-2026-53519 Nezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_key

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.HasPrefi...

CVE-2026-53519

Nezha Monitoring prior to v2.0.13 is affected by a path-traversal in the dashboard NoRoute handler. The code uses strings.HasPrefix on URLs that start with /dashboard, so an input like /dashboard../data/config.yaml is accepted; trimming the prefix yields ../data/config.yaml and path.Join("admin-d...

EUVD-2026-36597

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services EnableShowInService: false are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version...

CVE-2026-49397 Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services EnableShowInService: false are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version...

CVE-2026-49397 Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services EnableShowInService: false are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version...

CVE-2026-49397 Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services EnableShowInService: false are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version...