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CVE-2026-35194
high
CVSS 8.1
Code Injection in flink (CVE-2026-35194)
Summary
code injection in flink (CVE-2026-35194). Confidential information can be exposed externally. Mitigation: upgrade to `1.20.4, 2.0.2, 2.1.1, 2.2.1` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-35194** has been found in flink.
Confidential information can be exposed externally. CVSS score: 8.1/10.
What to do: upgrade flink to **1.20.4, 2.0.2, 2.1.1, 2.2.1** or later.
If unsure, ask your IT team or search "flink CVE-2026-35194" on the vendor's site.
CVE-2026-35194 (flink) — CWE-94 / CVSS v3 8.1
Attack vector: remote (network-reachable) / no user interaction
Patched: `1.20.4, 2.0.2, 2.1.1, 2.2.1` — 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
**arbitrary code execution** (CWE-94) exists in flink.
📍 Affected scope
flink — .
🔥 Severity
Severity: High (CVSS 8.1/10). Confidential information can be exposed externally
🔧 How to fix
Update to **1.20.4, 2.0.2, 2.1.1, 2.2.1**.
🛡️ 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 'flink' .` 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 'flink' . | 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 `flink` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade flink to 1.20.4, 2.0.2, 2.1.1, 2.2.1ステージング環境で 1.20.4, 2.0.2, 2.1.1, 2.2.1 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
flink
[{"type":"SEMVER","events":[{"introduced":"1.15.0"},{"fixed":"1.20.4"},{"introduced":"2.0.0"},{"fixed":"2.0.2"},{"introduced":"2.1.0"},{"fixed":"2.1.1"},{"introduced":"2.2.0"},{"fixed":"2.2.1"}]}]
maven
org.apache.flink:flink-table-planner_2.12
[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.2.1"}]}]
maven
org.apache.flink:flink-table-api-java
[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.2.1"}]}]
maven
org.apache.flink:flink-table-runtime
[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.2.1"}]}]
References
- package https://github.com/apache/flink
- web https://lists.apache.org/thread/qh52bw4hhvy7n2owd8b3bt51mz0lvj9x
- web https://nvd.nist.gov/vuln/detail/CVE-2026-35194
- web https://github.com/advisories/GHSA-2f54-v4hm-fx73
- web http://www.openwall.com/lists/oss-security/2026/05/15/20
- web https://github.com/apache/flink/commit/64007b131d689158af90ca1c1b71b018129a85c5
- web https://github.com/apache/flink/commit/8db22cf8fbc4c785f6ffd41c2fd3e8b64a9688cd