EUVD-2026-64261
GHSA-f8p4-pxm9-xwx5
Severity by source
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/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:X
Local CLI tool requires user or automation to invoke with crafted argument (AV:L, UI:R); no privileges needed to supply a CLI flag (PR:N); shell injection yields full system-level command execution (C:H/I:H/A:H).
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
better-npm-audit through 3.11.0, and the 4.0.0-rc.2 prerelease, builds its npm audit command by interpolating the user-supplied --registry option into a command string in src/handlers/handleInput.ts without validation or quoting, then passes that string to child_process.exec() in index.ts, which spawns a shell. A registry value containing shell metacharacters such as a semicolon, pipe, or command substitution executes arbitrary operating system commands with the privileges of the process running the audit.
AnalysisAI
Command injection in better-npm-audit through 3.11.0 (and the 4.0.0-rc.2 prerelease) allows arbitrary OS command execution when a value containing shell metacharacters is supplied to the --registry CLI flag. The vulnerability exists because handleInput.ts interpolates the raw registry value into a shell command string that is then passed to Node.js child_process.exec(), which spawns a system shell and interprets metacharacters such as semicolons, pipes, and backticks as command separators or substitutions. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires control over the value passed to the --registry flag of better-npm-audit. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.5 reflects high impact across confidentiality, integrity, and availability (VC:H/VI:H/VA:H) with low attack complexity, but the local attack vector (AV:L) and passive user interaction requirement (UI:P) substantially constrain the realistic threat surface compared to a network-exploitable vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patched version has been confirmed at time of analysis - the upstream fix exists only as pull request #120 at https://github.com/jeemok/better-npm-audit/pull/120, which adds URL validation to the registry argument. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all build pipelines and development environments for better-npm-audit installations, particularly in automated CI/CD systems, to determine exposure scope. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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