CVE-2026-94185 (GCVE-0-2026-94185)

Vulnerability from cvelistv5 – Published: 2026-09-21 02:27 – Updated: 2026-09-21 02:27
VLAI
Title
nvm alias resolution follows `..` and discloses files outside $NVM_DIR/alias
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
6.7 (Medium)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
Vendor Product Version CPE status
nvm-sh nvm Affected: 0 , ≤ 0.40.7 (semver)
Unaffected: 0.40.8 (semver)
guessed Create a notification for this product.
Credits
vnth4nhnt of CyStack SecFathy
Show details on NVD website
To clipboard 

{
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              "status": "unaffected",
              "version": "0.40.8",
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          "type": "finder",
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              "value": "\u003cp\u003envm 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\u0027s 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 \u0026lt;traversing-name\u0026gt;` discloses every non-comment line of the target file. There is no integrity or availability impact, and no command execution on this path.\u003c/p\u003e"
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          "value": "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\u0027s 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 \u003ctraversing-name\u003e` discloses every non-comment line of the target file. There is no integrity or availability impact, and no command execution on this path."
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        "shortName": "harborist"
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          "name": "GHSA-8grh-q73j-ffrc",
          "tags": [
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          "url": "https://github.com/nvm-sh/nvm/security/advisories/GHSA-8grh-q73j-ffrc"
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              "value": "\u003cp\u003eUpgrade to nvm 0.40.8 or later, which rejects any `..` path component in nvm_alias() and nvm_version_path().\u003c/p\u003e"
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          ],
          "value": "Upgrade to nvm 0.40.8 or later, which rejects any `..` path component in nvm_alias() and nvm_version_path()."
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      ],
      "title": "nvm alias resolution follows `..` and discloses files outside $NVM_DIR/alias"
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    "assignerShortName": "harborist",
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    "datePublished": "2026-09-21T02:27:00.752Z",
    "dateReserved": "2026-09-21T02:14:56.481Z",
    "dateUpdated": "2026-09-21T02:27:00.752Z",
    "state": "PUBLISHED"
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        "lastModified": "2026-09-21T03:16:34.243",
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                "confidentialityRequirement": "NOT_DEFINED",
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                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
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                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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                "privilegesRequired": "NONE",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.