Vulnerability in asyncua (CVE-2023-26150)

Summary

vulnerability in asyncua (CVE-2023-26150). Confidential information can be exposed externally. Mitigation: upgrade to `b4106dfd5037423c9d1810b48a97296b59cde513, 2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a, 0.9.96` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2023-26150** has been found in asyncua. Confidential information can be exposed externally. CVSS score: ?/10. What to do: upgrade asyncua to **b4106dfd5037423c9d1810b48a97296b59cde513, 2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a, 0.9.96** or later. If unsure, ask your IT team or search "asyncua CVE-2023-26150" on the vendor's site.

CVE-2023-26150 (asyncua) — Attack vector: remote (network-reachable) / unauthenticated / no user interaction Patched: `b4106dfd5037423c9d1810b48a97296b59cde513, 2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a, 0.9.96` — 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** (unclassified) exists in asyncua.

📍 Affected scope

asyncua — .

🔥 Severity

Severity: ?. Confidential information can be exposed externally

🔧 How to fix

Update to **b4106dfd5037423c9d1810b48a97296b59cde513, 2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a, 0.9.96**.

🛡️ 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 'asyncua' .` 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

1
Identify exposure identify
```
grep -r 'asyncua' . | 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 `asyncua` を grep し、稼働しているサービス・バージョンを把握する。
6
Apply patch patch
```
Upgrade asyncua to b4106dfd5037423c9d1810b48a97296b59cde513, 2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a, 0.9.96
```
ステージング環境で b4106dfd5037423c9d1810b48a97296b59cde513, 2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a, 0.9.96 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。
7
Post-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

PyPI asyncua

[{"repo":"https:\/\/github.com\/FreeOpcUa\/opcua-asyncio","type":"GIT","events":[{"introduced":"0"},{"fixed":"b4106dfd5037423c9d1810b48a97296b59cde513"},{"fixed":"2be7ce80df05de8d6c6ae1ebce6fa2bb7147844a"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.96"}]}]