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CVE-2026-71538

@cyclonedx/cyclonedx-npm: Shell Injection via Unsanitized --workspace Argument on Windows

CVSS score

8.5

EPSS probability

%0.2

Risk score

0.0

Published

1 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-71538 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

@cyclonedx/cyclonedx-npm creates CycloneDX Software Bill of Materials from npm projects. Prior to version 6.0.0, the Windows fallback path in src/npmRunner.ts, used when npm_execpath does not provide the npm CLI path, can construct a shell command containing an untrusted value from the --workspace option. When an attacker can influence that option and the fallback npm execution path is reached, shell metacharacters in the workspace value can execute arbitrary operating-system commands with the privileges of the user running the CLI, allowing data access, file modification, or service disruption. This issue is fixed in version 6.0.0.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-71538 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1CycloneDXcyclonedx-node-npm View
2npm@cyclonedx/cyclonedx-npm View
3npm@cyclonedx/cyclonedx-npm View
Total affected vendors: 2|Products: 3

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
8.5CVSS 4.0—Vector not publishedGitHub Advisory
8.5CVSS V40HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD
8.5CVSS V4_0HIGHCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

gitlabnpm/@cyclonedx/cyclonedx-npm6.0.0

GitLab Advisory düzeltilmiş sürüm: 6.0.0

gitlab

Upgrade to version 6.0.0 or above.

canonical

Upgrade to version 6.0.0 or above.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-71538 is associated with the following CWEs:

CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')CWE-937: Common Weakness Enumeration Entry CWE-937CWE-1035: Common Weakness Enumeration Entry CWE-1035

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-71538 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureYerel erişim
PermissionsGerekmiyor
User—

Official Sources and Advisories

https://github.com/CycloneDX/cyclonedx-node-npm/security/advisories/GHSA-q69g-4hcv-6jg4vendor-advisoryhttps://github.com/CycloneDX/cyclonedx-node-npm/pull/1489vendor-advisoryhttps://github.com/CycloneDX/cyclonedx-node-npm/commit/15d3beb5bcd2b0b6eccfdf31192f5103b3f12c0fvendor-advisoryhttps://github.com/CycloneDX/cyclonedx-node-npm/releases/tag/v6.0.0vendor-advisoryhttps://github.com/advisories/GHSA-q69g-4hcv-6jg4vendor-advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-71538vendor-advisory

CVSS Vector Radar Chart

8.5 / 10
Attack VectorLocalComplexityLowPrivilegesNoneUser Interact.RequiredConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredNone required
User InteractionP
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)P
Availability (Erişilebilirlik)High

Yama doğrulandı

1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

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C
CycloneDX logo
CycloneDX
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npm logo
npm

Weakness Type (CWE & CAPEC)

CWE-78 CWE-937 CWE-1035

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