Authorization Flaw in github.com/nezhahq/nezha (CVE-2026-46717)
Summary
Vulnerability in github.com/nezhahq/nezha (CVE-2026-46717). Confidential information can be exposed externally. Exploitable via POST /api/v1/notification. Mitigation: upgrade to 1.14.15-0.20260517022419-d06d539d34c1 or later.
Original description
The description as published by the source.
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.8, nezha's dashboard supports two user roles: RoleAdmin (Role==0) and RoleMember (Role==1). The notification routes POST /api/v1/notification and PATCH /api/v1/notification/:id are wired through commonHandler rather than adminHandler — so a RoleMember user can call them. These handlers synchronously Send() an HTTP request to a user-controlled URL and reflect the entire response body (no size limit) back to the caller on any non-2xx response. This issue has been patched in version 2.0.8.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-46717 has been found in github.com/nezhahq/nezha.
Attackers can target a specific entry point like POST /api/v1/notification over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.7/10.
What to do: upgrade github.com/nezhahq/nezha to 1.14.15-0.20260517022419-d06d539d34c1 or later.
If unsure, ask your IT team or search "github.com/nezhahq/nezha CVE-2026-46717" on the vendor's site.
CVE-2026-46717 (github.com/nezhahq/nezha) — CWE-863 / CVSS v3 7.7
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/v1/notification / PATCH /api/v1/notification/ / PATCH /notification/ / RoleAdmin
Patched: 1.14.15-0.20260517022419-d06d539d34c1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Incorrect authorization (CWE-863) exists in github.com/nezhahq/nezha. Attackers reach the vulnerable code path via POST /api/v1/notification.
Check the vendor advisory for the affected versions of github.com/nezhahq/nezha. Attack surface: POST /api/v1/notification / PATCH /api/v1/notification/ / PATCH /notification/ / RoleAdmin.
Severity: High (CVSS 7.7/10). Confidential information can be exposed externally.
Update to 1.14.15-0.20260517022419-d06d539d34c1.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /api/v1/notification requests with malformed payloads or SQL meta-characters. Run grep -r 'github.com/nezhahq/nezha' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'github.com/nezhahq/nezha' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
github.com/nezhahq/nezhaを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /api/v1/notification' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/v1/notificationへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Apply patch patch
Upgrade github.com/nezhahq/nezha to 1.14.15-0.20260517022419-d06d539d34c1ステージング環境で 1.14.15-0.20260517022419-d06d539d34c1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 2 で見つけた異常検知の続報チェックを含めること。
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4Post-deployment verification verify
Replay attack against POST /api/v1/notification on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com
- web github.com