CVE-2026-121750: nvm install --offline installs a cached tarball that previously failed checksum verification

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of 10 Nov 2026. If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?

0.1%

EPSS score, percentile 3.9 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?

2.1 Low

CVSS v4.0 base score, given by the CNA

What should I do?

Upgrade to nvm 0.41.0 or later, which removes an archive that fails verification instead of caching it.Solution from the CVE record.

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (2)

Which versions are affected?

Affected

• from 0.40.5 to before 0.41.0

Versions by product

Source: CISA KEV 2026.11.10, as of 10 Nov 2026; FIRST EPSS, as of 12 Nov 2026; CVE List, as of 12 Nov 2026. About the data.

Description

nvm install --offline installs a cached tarball that previously failed checksum verification

Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.5 through 0.40.8, `nvm_download_artifact` downloads a release archive directly to its final path in `$NVM_DIR/.cache` and verifies its checksum afterwards; on a checksum mismatch it reports an error but leaves the rejected archive in place. A later `nvm install --offline` of the same version installs that cached file without a checksum, so an archive that was just rejected gets installed and its `node` and `npm` run. This gives code execution to a party who can alter the downloaded tarball (for example a poisoned CDN or cache object) but cannot also forge the `SHASUMS256.txt` beside it, if the victim runs `nvm install --offline` for that version after the visible "Checksums do not match" failure and before any online retry. Version 0.41.0 only puts an archive in the cache once its checksum has passed.

Source: CVE List, as of 12 Nov 2026. About the data.

What to do

Advisories and patches

• Fix commit 1f99e4c2 (Patch)
• GHSA-262q-c465-prmr (Vendor advisory)

Workaround (from the CVE record)

Until upgrading, after any "Checksums do not match" error, run `nvm cache clear` before using `nvm install --offline`.

This summary is based on the CVE record as of 12 Nov 2026. Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

Source: CVE List, as of 12 Nov 2026. About the data.

Timeline