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CVE-2026-39816
high
CVSS 8.8
Vulnerability in nifi (CVE-2026-39816)
Summary
vulnerability in nifi (CVE-2026-39816). Successful exploitation can lead to full system takeover. Mitigation: upgrade to `2.9.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-39816** has been found in nifi.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: upgrade nifi to **2.9.0** or later.
If unsure, ask your IT team or search "nifi CVE-2026-39816" on the vendor's site.
CVE-2026-39816 (nifi) — CWE-862 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Patched: `2.9.0` — 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-862) exists in nifi.
📍 Affected scope
nifi — .
🔥 Severity
Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **2.9.0**.
🛡️ 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 'nifi' .` 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
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1Identify exposure identify
grep -r 'nifi' . | 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 `nifi` 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 nifi to 2.9.0ステージング環境で 2.9.0 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。
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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
Bitnami
nifi
[{"type":"SEMVER","events":[{"introduced":"2.0.0"},{"fixed":"2.9.0"}]}]
maven
org.apache.nifi:nifi-other-graph-services-nar
[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0-M1"},{"fixed":"2.9.0"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-39816
- package https://github.com/apache/nifi
- web https://lists.apache.org/thread/gh9g7xwvv4l20gzff6q3367snf35ctcb
- web http://www.openwall.com/lists/oss-security/2026/04/13/8
- web https://zeropath.com/blog/nifi-cve-2026-39816-privesc-rce
- web https://github.com/advisories/GHSA-2j9m-25xv-mp6r
- web https://github.com/apache/nifi/pull/11108
- web https://github.com/apache/nifi/commit/72fab7dde74edfd1063b57e87b0334340c1fbe93