← Back
CVE-2026-39087
medium
CVSS 6.4
Vulnerability in heckel.io/ntfy/v2 (CVE-2026-39087)
Summary
vulnerability in heckel.io/ntfy/v2 (CVE-2026-39087). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `2.22.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-39087** has been found in heckel.io/ntfy/v2.
Risk of unauthorized operations or information disclosure. CVSS score: 6.4/10.
What to do: upgrade heckel.io/ntfy/v2 to **2.22.0** or later.
If unsure, ask your IT team or search "heckel.io/ntfy/v2 CVE-2026-39087" on the vendor's site.
CVE-2026-39087 (heckel.io/ntfy/v2) — CWE-777 / CVSS v3 6.4
Attack vector: remote (network-reachable) / no user interaction
Patched: `2.22.0` — 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.
❓ What is the problem
**A vulnerability** (CWE-777) exists in heckel.io/ntfy/v2.
📍 Affected scope
heckel.io/ntfy/v2 — .
🔥 Severity
Severity: Medium (CVSS 6.4/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **2.22.0**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'heckel.io/ntfy/v2' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'heckel.io/ntfy/v2' . | 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 `heckel.io/ntfy/v2` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade heckel.io/ntfy/v2 to 2.22.0ステージング環境で 2.22.0 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 3 で見つけた異常検知の続報チェックを含めること。
-
7Post-deployment verification verify
Confirm patched version is live in production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 3 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
go
heckel.io/ntfy/v2
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.22.0"}]}]