CVE-2026-121746: Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions

Routine

MEDIUM 5.5UPGRADE

CVE-2026-121746 is a medium-severity flaw (CVSS 5.5) affecting nvm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.0 through 0.40.8, `nvm use --save` and `nvm install --save` (or `-w`) write the resolved version to `$PWD/.nvmrc` with `tee`, which follows a symbolic link. A repository that commits `.nvmrc` as a symlink to a path outside itself (git recreates the link on clone) therefore makes `--save` truncate any file the user can write, suc

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-59
Published	2026-11-04
Last modified	2026-11-04

Publisher (CNA): harborist · Vendor: nvm-sh · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-04 21:31 UTCPublished CVE record published
2026-11-04 21:31 UTCUpdated Record last modified

nvm-sh nvm UPGRADE

Affected: >= 0.40.0 and < 0.41.0

Fixed in: 0.41.0

Safe to downgrade to: a release before 0.40.0

1. Check installed version

apt-cache policy nvm || rpm -q nvm || nvm --version

2. UPGRADE to 0.41.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nvm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nvm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.40.0 (Debian / Ubuntu)

apt-cache madison nvm sudo apt install nvm=<VERSION_BEFORE_0.40.0> sudo apt-mark hold nvm

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nvm sudo dnf downgrade nvm-<VERSION_BEFORE_0.40.0> sudo dnf versionlock add nvm

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-121746?

nvm: upgrade to 0.41.0. Exact commands for each OS are on this page.

Is CVE-2026-121746 being exploited?

CVE-2026-121746 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-121746 affect?

CVE-2026-121746 affects nvm. Severity is medium (CVSS 5.5). Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.0 through 0.40.8, `nvm use --save` and `nvm install --save` (or `-w`) write the resolved version to `$PWD/.nvmrc` with `

How urgent is CVE-2026-121746?

Priority 19/100. No elevated risk signals yet.

Software pages

Node.js vulnerabilities · Git vulnerabilities

Related CVEs

CVE-2026-121749 LOW 3.3 UPGRADE Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions
CVE-2026-121747 MEDIUM 5.5 UPGRADE Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions
CVE-2026-121748 LOW 3.6 UPGRADE Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions
CVE-2026-121750 LOW 3.1 UPGRADE Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions
CVE-2026-121745 LOW 2.5 UPGRADE Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions

References

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