CVE-2026-1665

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 48% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A command injection vulnerability exists in nvm (Node Version Manager) versions 0.40.3 and below. The nvm_download() function uses eval to execute wget commands, and the NVM_AUTH_HEADER environment variable was not sanitized in the wget code path (though it was sanitized in the curl code path). An attacker who can set environment variables in a victim's shell environment (e.g., via malicious CI/CD configurations, compromised dotfiles, or Docker images) can inject arbitrary shell commands that execute when the victim runs nvm commands that trigger downloads, such as 'nvm install' or 'nvm ls-remote'.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
53%
KEV
Not listed

Published

January 29, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Aug 9, 2026
Patch available. Sources: github_commit, github_pr, github_release.
github_release Patch Available

v0.40.4

Patch available: nvm-sh/nvm v0.40.4

https://github.com/nvm-sh/nvm/releases/tag/v0.40.4
github_pr Patch Available

Auth support for NVM_AUTH_HEADER env var

Patch available: nvm-sh/nvm v0.40.0 (PR #3380 merged 2024-07-26)

https://github.com/nvm-sh/nvm/pull/3380
github_commit Patch Available

commit 44e2590cdf25 (nvm-sh/nvm)

Patch available: nvm-sh/nvm v0.40.4 (contains commit 44e2590cdf25)

https://github.com/nvm-sh/nvm/commit/44e2590cdf257faf7d885e4470be8dc66cec9506
generic

GitHub - nvm-sh/nvm: Node Version Manager - POSIX-compliant bash script to manage multiple active node.js versions · GitHub

https://github.com/nvm-sh/nvm

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 169 total refreshes for this CVE.

  1. 2026-09-19 00:00 UTCOSV refresh
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-16 14:07 UTCEPSS rescore
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  23. 2026-08-02 21:51 UTCEG score recompute
  24. 2026-08-02 02:26 UTCEPSS rescore
  25. 2026-08-01 04:15 UTCEPSS rescore
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  74. 2026-06-27 03:08 UTCEPSS rescore
  75. 2026-06-25 13:49 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-1665?
CVE-2026-1665 is a medium vulnerability published on January 29, 2026. A command injection vulnerability exists in nvm (Node Version Manager) versions 0.40.3 and below. The nvmdownload() function uses eval to execute wget commands, and the NVMAUTH_HEADER environment variable was not sanitized in the wget code path (though it was sanitized in the curl code path). An…
When was CVE-2026-1665 disclosed?
CVE-2026-1665 was first published in the National Vulnerability Database on January 29, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-1665 actively exploited?
CVE-2026-1665 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 46.8% of all scored CVEs.
What is the CVSS score of CVE-2026-1665?
CVE-2026-1665 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-1665?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-1665, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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