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CVE-2026-54155
Vulnerability in node-opcua (CVE-2026-54155)
Summary
vulnerability in node-opcua (CVE-2026-54155). Risk of unauthorized operations or information disclosure. Exploitable via ``session.nonce``.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-54155** has been found in node-opcua.
Attackers can target a specific entry point like ``session.nonce`` over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: ?/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "node-opcua CVE-2026-54155" on the vendor's site.
CVE-2026-54155 (node-opcua) — CWE-347 /
Attack surface: `session.nonce` / `GetEndpoints` / `serverNonce.length` / `verifyClientSignature`
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-347) exists in node-opcua. Attackers reach the vulnerable code path via ``session.nonce`` without authentication.
📍 Affected scope
node-opcua — . Attack surface: `session.nonce` / `GetEndpoints` / `serverNonce.length` / `verifyClientSignature`.
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ 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 'node-opcua' .` 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 'node-opcua' . | 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 `node-opcua` 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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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
npm
node-opcua
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