CVE-2026-121747 (GCVE-0-2026-121747)

Vulnerability from cvelistv5 – Published: 2026-11-04 21:30 – Updated: 2026-11-04 21:30
VLAI
Title
nvm prints the contents of any readable file through a symlinked .nvmrc
Summary
Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.2.0 through 0.40.8, nvm does not check whether `.nvmrc` is a symbolic link. A repository or archive that ships `.nvmrc` as a symlink to another file (for example `../../.npmrc`, or `/proc/self/environ` on Linux) makes a plain `nvm use`, `nvm install`, `nvm which`, `nvm exec`, `nvm run`, or `nvm-exec` read that file and print its contents in the invalid-`.nvmrc` message (even with `--silent`) or, for a one-line file, in the `Found ... with version <...>` message; with the README's zsh `load-nvmrc` or bash `cdnvm` hook installed, entering the directory is enough. nvm sends the content nowhere; the attacker learns it only where they can see the victim's output, such as a CI log for a contributed branch. Version 0.41.0 still follows a symlinked `.nvmrc`, so deliberate links to another version file keep working, but never prints its content, and accepts it only if it contains a version or the name of an existing alias; the README's bash `cdnvm` hook, which read `.nvmrc` itself, now gets the version from nvm, so users of that hook must also update their copy of it.
Severity
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-61 - UNIX Symbolic Link (Symlink) Following
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
harborist CNA under the redhat root
CNA scorecard B 86/100 over 22 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
nvm-sh nvm Affected: 0.2.0 , < 0.41.0 (semver)
guessed Create a notification for this product.
Credits
Anthropic's OSS Scanner, as vulnerability ANT-2026-G9REVGKT d3doxp (https://github.com/d3doxp) Jordan Harband (https://github.com/ljharb)
Show details on NVD website
To clipboard 

{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "nvm",
          "repo": "https://github.com/nvm-sh/nvm",
          "vendor": "nvm-sh",
          "versions": [
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              "status": "affected",
              "version": "0.2.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Anthropic\u0027s OSS Scanner, as vulnerability ANT-2026-G9REVGKT"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "d3doxp (https://github.com/d3doxp)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jordan Harband (https://github.com/ljharb)"
        }
      ],
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              "value": "\u003cp\u003eNode Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.2.0 through 0.40.8, nvm does not check whether `.nvmrc` is a symbolic link. A repository or archive that ships `.nvmrc` as a symlink to another file (for example `../../.npmrc`, or `/proc/self/environ` on Linux) makes a plain `nvm use`, `nvm install`, `nvm which`, `nvm exec`, `nvm run`, or `nvm-exec` read that file and print its contents in the invalid-`.nvmrc` message (even with `--silent`) or, for a one-line file, in the `Found ... with version \u0026lt;...\u0026gt;` message; with the README\u0027s zsh `load-nvmrc` or bash `cdnvm` hook installed, entering the directory is enough. nvm sends the content nowhere; the attacker learns it only where they can see the victim\u0027s output, such as a CI log for a contributed branch. Version 0.41.0 still follows a symlinked `.nvmrc`, so deliberate links to another version file keep working, but never prints its content, and accepts it only if it contains a version or the name of an existing alias; the README\u0027s bash `cdnvm` hook, which read `.nvmrc` itself, now gets the version from nvm, so users of that hook must also update their copy of it.\u003c/p\u003e"
            }
          ],
          "value": "Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.2.0 through 0.40.8, nvm does not check whether `.nvmrc` is a symbolic link. A repository or archive that ships `.nvmrc` as a symlink to another file (for example `../../.npmrc`, or `/proc/self/environ` on Linux) makes a plain `nvm use`, `nvm install`, `nvm which`, `nvm exec`, `nvm run`, or `nvm-exec` read that file and print its contents in the invalid-`.nvmrc` message (even with `--silent`) or, for a one-line file, in the `Found ... with version \u003c...\u003e` message; with the README\u0027s zsh `load-nvmrc` or bash `cdnvm` hook installed, entering the directory is enough. nvm sends the content nowhere; the attacker learns it only where they can see the victim\u0027s output, such as a CI log for a contributed branch. Version 0.41.0 still follows a symlinked `.nvmrc`, so deliberate links to another version file keep working, but never prints its content, and accepts it only if it contains a version or the name of an existing alias; the README\u0027s bash `cdnvm` hook, which read `.nvmrc` itself, now gets the version from nvm, so users of that hook must also update their copy of it."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 6.7,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
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            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "descriptions": [
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              "cweId": "CWE-59",
              "description": "CWE-59 Improper Link Resolution Before File Access (\u0027Link Following\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
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              "description": "CWE-61 UNIX Symbolic Link (Symlink) Following",
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              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
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              "description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
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              "type": "CWE"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-04T21:30:32.903Z",
        "orgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
        "shortName": "harborist"
      },
      "references": [
        {
          "name": "GHSA-j6ch-mq5c-3h4x",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/nvm-sh/nvm/security/advisories/GHSA-j6ch-mq5c-3h4x"
        },
        {
          "name": "Fix commit 67268ebc",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/nvm-sh/nvm/commit/67268ebcb6e1a26ae3d71b3710d6333bb7358662"
        },
        {
          "name": "Fix commit c314f1cb",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/nvm-sh/nvm/commit/c314f1cbb3c301c587a4e4f96511d31f1134ffd1"
        }
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          "supportingMedia": [
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              "type": "text/html",
              "value": "\u003cp\u003eUpgrade to nvm 0.41.0 or later.\u003c/p\u003e"
            }
          ],
          "value": "Upgrade to nvm 0.41.0 or later."
        }
      ],
      "source": {
        "advisory": "GHSA-j6ch-mq5c-3h4x",
        "discovery": "EXTERNAL"
      },
      "title": "nvm prints the contents of any readable file through a symlinked .nvmrc",
      "workarounds": [
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              "value": "\u003cp\u003eUntil upgrading, check for a symlinked `.nvmrc` (`ls -l .nvmrc`) before running nvm in an untrusted project directory, and do not run nvm in CI for untrusted branches where its output is visible to their authors.\u003c/p\u003e"
            }
          ],
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        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
    "assignerShortName": "harborist",
    "cveId": "CVE-2026-121747",
    "datePublished": "2026-11-04T21:30:32.903Z",
    "dateReserved": "2026-11-03T23:38:59.223Z",
    "dateUpdated": "2026-11-04T21:30:32.903Z",
    "state": "PUBLISHED"
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      "date": "2026-11-05",
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    },
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                "defaultStatus": "unaffected",
                "product": "nvm",
                "repo": "https://github.com/nvm-sh/nvm",
                "vendor": "nvm-sh",
                "versions": [
                  {
                    "lessThan": "0.41.0",
                    "status": "affected",
                    "version": "0.2.0",
                    "versionType": "semver"
                  }
                ]
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            ],
            "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.2.0 through 0.40.8, nvm does not check whether `.nvmrc` is a symbolic link. A repository or archive that ships `.nvmrc` as a symlink to another file (for example `../../.npmrc`, or `/proc/self/environ` on Linux) makes a plain `nvm use`, `nvm install`, `nvm which`, `nvm exec`, `nvm run`, or `nvm-exec` read that file and print its contents in the invalid-`.nvmrc` message (even with `--silent`) or, for a one-line file, in the `Found ... with version \u003c...\u003e` message; with the README\u0027s zsh `load-nvmrc` or bash `cdnvm` hook installed, entering the directory is enough. nvm sends the content nowhere; the attacker learns it only where they can see the victim\u0027s output, such as a CI log for a contributed branch. Version 0.41.0 still follows a symlinked `.nvmrc`, so deliberate links to another version file keep working, but never prints its content, and accepts it only if it contains a version or the name of an existing alias; the README\u0027s bash `cdnvm` hook, which read `.nvmrc` itself, now gets the version from nvm, so users of that hook must also update their copy of it."
          }
        ],
        "id": "CVE-2026-121747",
        "lastModified": "2026-11-04T22:17:54.337",
        "metrics": {
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                "attackVector": "LOCAL",
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                "attackVector": "LOCAL",
                "availabilityRequirement": "NOT_DEFINED",
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                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
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                "subConfidentialityImpact": "NONE",
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                "valueDensity": "NOT_DEFINED",
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                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "NONE",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
              "type": "Secondary"
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        "references": [
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            "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
            "url": "https://github.com/nvm-sh/nvm/commit/67268ebcb6e1a26ae3d71b3710d6333bb7358662"
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            "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
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            "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
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          }
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        "vulnStatus": "Received",
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                "value": "CWE-59"
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                "value": "CWE-200"
              }
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            "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
            "type": "Secondary"
          }
        ]
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    }
  }
}



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