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CVE-2026-47103
critical
CVSS 9.8
Vulnerability in python-statemachine (CVE-2026-47103)
Summary
vulnerability in python-statemachine (CVE-2026-47103). Successful exploitation can lead to full system takeover. Exploitable via ``SCXMLProcessor``. Mitigation: upgrade to `3.2.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-47103** has been found in python-statemachine.
Attackers can target a specific entry point like ``SCXMLProcessor`` over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: upgrade python-statemachine to **3.2.0** or later.
If unsure, ask your IT team or search "python-statemachine CVE-2026-47103" on the vendor's site.
CVE-2026-47103 (python-statemachine) — CWE-95 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: `SCXMLProcessor` / `expr`
Patched: `3.2.0` — 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-95) exists in python-statemachine. Attackers reach the vulnerable code path via ``SCXMLProcessor`` without authentication.
📍 Affected scope
python-statemachine — . Attack surface: `SCXMLProcessor` / `expr`.
🔥 Severity
Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **3.2.0**.
🛡️ 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 'python-statemachine' .` 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 'python-statemachine' . | 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 `python-statemachine` 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 python-statemachine to 3.2.0ステージング環境で 3.2.0 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
pip
python-statemachine
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.0"}]}]