CVE-2026-121749

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In versions 0.5.0 through 0.40.8, the requested version pattern is passed to `grep` as a bare argument, without `-e`, in `nvm_ls_remote_index_tab`, `nvm_remote_version`, and `nvm_ls_cached`. A `.nvmrc` whose first line starts with `-`, such as `-Rohenpm_[A-Za-z0-9]*`, is parsed as grep options; with GNU grep, `-R` searches the current directory recursively (following symlinks) instead of the version list. On a bare `nvm install`, nvm then treats a matched string from those files as the version, prints it, and requests it from the configured mirror inside download URLs, so for example a repository containing a symlink to `../../.npmrc` can leak the user's npm token to the terminal and to the mirror's and any proxy's logs. The disclosure is read-only and limited to the characters `0-9A-Za-z._+-`. Version 0.41.0 passes every version pattern to grep with `-e`.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.5.0 through 0.40.8, the requested version pattern is passed to `grep` as a bare argument, without `-e`, in `nvm_ls_remote_index_tab`, `nvm_remote_version`, and `nvm_ls_cached`. A `.nvmrc` whose first line starts with `-`, such as `-Rohenpm_[A-Za-z0-9]*`, is parsed as grep options; with GNU grep, `-R` searches the current directory recursively (following symlinks) instead of the version list. On a bare `nvm install`, nvm then treats a matched string from those files as the version, prints it, and requests it from the configured mirror inside download URLs, so for example a repository containing a symlink to `../../.npmrc` can leak the user's npm token to the terminal and to the mirror's and any proxy's logs. The disclosure is read-only and limited to the characters `0-9A-Za-z._+-`. Version 0.41.0 passes every version pattern to grep with `-e`.</p>"}]}], "references": [{"url": "https://github.com/nvm-sh/nvm/security/advisories/GHSA-xmxw-6r9w-89gc", "name": "GHSA-xmxw-6r9w-89gc", "tags": ["vendor-advisory"]}, {"url": "https://github.com/nvm-sh/nvm/commit/bce663e3873fadbe8ebbc6e07e8d76fb12d5d69e", "name": "Fix commit bce663e3", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 4.6, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseSeverity": "LOW", "baseScore": 3.3, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"}}], "workarounds": [{"lang": "en", "value": "Until upgrading, check that `.nvmrc` does not start with `-` before running nvm in an untrusted project directory.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Until upgrading, check that `.nvmrc` does not start with `-` before running nvm in an untrusted project directory.</p>"}]}], "solutions": [{"lang": "en", "value": "Upgrade to nvm 0.41.0 or later.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to nvm 0.41.0 or later.</p>"}]}], "credits": [{"lang": "en", "value": "Anthropic's OSS Scanner, as vulnerability ANT-2026-EN9DM7WC", "type": "finder"}, {"lang": "en", "value": "Jordan Harband (https://github.com/ljharb)", "type": "remediation developer"}], "source": {"advisory": "GHSA-xmxw-6r9w-89gc", "discovery": "EXTERNAL"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-09T20:43:43.228476Z", "id": "CVE-2026-121749", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-09T20:43:52.150Z"}}]}}

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{"bugzilla": {"description": "nvm: nvm: information disclosure via crafted configuration file", "id": "2567808", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567808"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-88", "details": ["Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.5.0 through 0.40.8, the requested version pattern is passed to `grep` as a bare argument, without `-e`, in `nvm_ls_remote_index_tab`, `nvm_remote_version`, and `nvm_ls_cached`. A `.nvmrc` whose first line starts with `-`, such as `-Rohenpm_[A-Za-z0-9]*`, is parsed as grep options; with GNU grep, `-R` searches the current directory recursively (following symlinks) instead of the version list. On a bare `nvm install`, nvm then treats a matched string from those files as the version, prints it, and requests it from the configured mirror inside download URLs, so for example a repository containing a symlink to `../../.npmrc` can leak the user's npm token to the terminal and to the mirror's and any proxy's logs. The disclosure is read-only and limited to the characters `0-9A-Za-z._+-`. Version 0.41.0 passes every version pattern to grep with `-e`.", "A flaw was found in nvm. When processing version configuration files such as `.nvmrc`, input is passed to the search utility without proper option delimitation, allowing leading hyphens to be interpreted as command flags. An attacker who supplies a crafted configuration file can trick a user running nvm into reading unintended local files and following symbolic links. This flaw can lead to information disclosure, potentially exposing sensitive data such as authentication tokens in terminal output, network requests, and proxy logs."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-121749", "public_date": "2026-11-04T21:31:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-121749\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-121749\nhttps://github.com/nvm-sh/nvm/commit/bce663e3873fadbe8ebbc6e07e8d76fb12d5d69e\nhttps://github.com/nvm-sh/nvm/security/advisories/GHSA-xmxw-6r9w-89gc"], "statement": "This vulnerability is rated as Low severity because successful exploitation requires local user interaction to process an untrusted project file and only exposes limited read-only data without compromising system integrity or service availability. Red Hat Enterprise Linux and related container environments do not distribute Node Version Manager as an integrated system service or standard package, confining potential exposure to developer environments where the tool is installed independently. Furthermore, triggering the flaw requires an attacker to convince a user to run version management commands against a specially crafted configuration file.", "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.5.0,0.41.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "nvm", "source": "cna", "vendor": "nvm-sh"}, "product": "nvm", "vendor": "nvm-sh"}], "created": "2026-11-04T22:45:14.985536+00:00", "updated": "2026-11-04T23:15:16.370888+00:00", "vendors": ["nvm-sh", "nvm-sh$PRODUCT$nvm"]}