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CVE-2026-94185

nvm alias resolution follows `..` and discloses files outside $NVM_DIR/alias

CVSS 3.1 5.5 MEDIUMCVSS 4.0 6.7 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-94185

Published

nvm resolves a requested version or alias by treating it as a filename under $NVM_DIR/alias. Before 0.40.8, nvm_alias() concatenated the requested name onto that directory and read the result with no containment check, so a name containing a `..` component escaped the alias directory; under the default layout an alias such as `../../.npmrc` resolves to a file in the user's home directory. nvm_print_alias_file() then emits every non-comment, non-empty line of whatever was opened. A version string taken from an untrusted .nvmrc reaches this path, so a developer who runs `nvm use`, `nvm install`, or `nvm which` inside an attacker-supplied repository discloses the first non-comment line of an arbitrary file readable by that user, in the resulting "is not yet installed" error message. A user-supplied `nvm alias <traversing-name>` discloses every non-comment line of the target file. There is no integrity or availability impact, and no command execution on this path.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-94185

Published

nvm

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

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "nvm-sh",
                    "product": "nvm",
                    "collectionURL": "https://github.com/nvm-sh/nvm",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThanOrEqual": "0.40.7",
                            "versionType": "semver"
                        },
                        {
                            "status": "unaffected",
                            "version": "0.40.8",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON