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CVE-2026-71538

OS Command Injection in @cyclonedx/cyclonedx-npm (CVE-2026-71538)

Summary

OS command injection in @cyclonedx/cyclonedx-npm (CVE-2026-71538). Risk of unauthorized operations or information disclosure. Exploitable via npm_execpath. Mitigation: upgrade to 6.0.0 or later.

Original description

The description as published by the source.

Summary

A Windows-specific command injection vulnerability exists in @cyclonedx/cyclonedx-npm when the CLI is invoked with the --workspace option.
User-supplied --workspace values can be passed to a shell command without proper neutralization on the Windows fallback execution path, enabling attackers to inject arbitrary OS commands.

The vulnerability was fixed in version [6.0.0][v6.0.0].

Vulnerability Details

When cyclonedx-npm is executed with the --workspace option, the provided argument is incorporated into an internal command execution flow.
On Windows systems, this path can interpret untrusted --workspace input as shell syntax if not safely handled.

As a result, specially crafted workspace names can break out of the intended command context and execute arbitrary commands with the privileges of the invoking user.

Impact

An attacker who can influence the value passed to --workspace can execute arbitrary OS commands on Windows hosts.
This may lead to:

  • Arbitrary command execution
  • Data exfiltration
  • Local privilege escalation (depending on runtime context and privileges)
  • Modification or destruction of files accessible to the user running the CLI

The vulnerability affects only scenarios where:

  • The user invokes cyclonedx-npm with --workspace , and
  • The vulnerable execution path is reached on Windows.

Exploitation Conditions (High-Level)

Exploitation requires the attacker to supply or influence the `--w…

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-71538 has been found in @cyclonedx/cyclonedx-npm.
Attackers can target a specific entry point like npm_execpath over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade @cyclonedx/cyclonedx-npm to 6.0.0 or later.
If unsure, ask your IT team or search "@cyclonedx/cyclonedx-npm CVE-2026-71538" on the vendor's site.

CVE-2026-71538 (@cyclonedx/cyclonedx-npm) — CWE-78
Attack surface: npm_execpath
Patched: 6.0.0 — 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

OS command injection (CWE-78) exists in @cyclonedx/cyclonedx-npm. Attackers reach the vulnerable code path via npm_execpath.

📍 Affected scope

Check the vendor advisory for the affected versions of @cyclonedx/cyclonedx-npm. Attack surface: npm_execpath.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 6.0.0.

🛡️ 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 '@cyclonedx/cyclonedx-npm' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r '@cyclonedx/cyclonedx-npm' . | 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 @cyclonedx/cyclonedx-npm を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade @cyclonedx/cyclonedx-npm to 6.0.0

    ステージング環境で 6.0.0 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を含めること。

  3. 3
    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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

npm @cyclonedx/cyclonedx-npm
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0"}]}]

References

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