{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121750", "assignerOrgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "state": "PUBLISHED", "assignerShortName": "harborist", "dateReserved": "2026-11-03T23:39:03.684Z", "datePublished": "2026-11-04T21:28:43.821Z", "dateUpdated": "2026-11-04T21:28:43.821Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "shortName": "harborist", "dateUpdated": "2026-11-04T21:28:43.821Z"}, "title": "nvm install --offline installs a cached tarball that previously failed checksum verification", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-494", "description": "CWE-494 Download of Code Without Integrity Check", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-459", "description": "CWE-459 Incomplete Cleanup", "type": "CWE"}]}], "affected": [{"vendor": "nvm-sh", "product": "nvm", "repo": "https://github.com/nvm-sh/nvm", "versions": [{"status": "affected", "version": "0.40.5", "lessThan": "0.41.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.5 through 0.40.8, `nvm_download_artifact` downloads a release archive directly to its final path in `$NVM_DIR/.cache` and verifies its checksum afterwards; on a checksum mismatch it reports an error but leaves the rejected archive in place. A later `nvm install --offline` of the same version installs that cached file without a checksum, so an archive that was just rejected gets installed and its `node` and `npm` run. This gives code execution to a party who can alter the downloaded tarball (for example a poisoned CDN or cache object) but cannot also forge the `SHASUMS256.txt` beside it, if the victim runs `nvm install --offline` for that version after the visible \"Checksums do not match\" failure and before any online retry. Version 0.41.0 only puts an archive in the cache once its checksum has passed.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.5 through 0.40.8, `nvm_download_artifact` downloads a release archive directly to its final path in `$NVM_DIR/.cache` and verifies its checksum afterwards; on a checksum mismatch it reports an error but leaves the rejected archive in place. A later `nvm install --offline` of the same version installs that cached file without a checksum, so an archive that was just rejected gets installed and its `node` and `npm` run. This gives code execution to a party who can alter the downloaded tarball (for example a poisoned CDN or cache object) but cannot also forge the `SHASUMS256.txt` beside it, if the victim runs `nvm install --offline` for that version after the visible \"Checksums do not match\" failure and before any online retry. Version 0.41.0 only puts an archive in the cache once its checksum has passed.</p>"}]}], "references": [{"url": "https://github.com/nvm-sh/nvm/security/advisories/GHSA-262q-c465-prmr", "name": "GHSA-262q-c465-prmr", "tags": ["vendor-advisory"]}, {"url": "https://github.com/nvm-sh/nvm/commit/1f99e4c20bb92c5737b92512446acf8e303b1edd", "name": "Fix commit 1f99e4c2", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "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": "LOW", "baseScore": 2.1, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseSeverity": "LOW", "baseScore": 3.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N"}}], "workarounds": [{"lang": "en", "value": "Until upgrading, after any \"Checksums do not match\" error, run `nvm cache clear` before using `nvm install --offline`.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Until upgrading, after any \"Checksums do not match\" error, run `nvm cache clear` before using `nvm install --offline`.</p>"}]}], "solutions": [{"lang": "en", "value": "Upgrade to nvm 0.41.0 or later, which removes an archive that fails verification instead of caching it.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Upgrade to nvm 0.41.0 or later, which removes an archive that fails verification instead of caching it.</p>"}]}], "credits": [{"lang": "en", "value": "Anthropic's OSS Scanner, as vulnerability ANT-2026-7NCT51FE", "type": "finder"}, {"lang": "en", "value": "Jordan Harband (https://github.com/ljharb)", "type": "remediation developer"}], "source": {"advisory": "GHSA-262q-c465-prmr", "discovery": "EXTERNAL"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "nvm", "repo": "https://github.com/nvm-sh/nvm", "vendor": "nvm-sh", "versions": [{"lessThan": "0.41.0", "status": "affected", "version": "0.40.5", "versionType": "semver"}]}], "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 0.40.5 through 0.40.8, `nvm_download_artifact` downloads a release archive directly to its final path in `$NVM_DIR/.cache` and verifies its checksum afterwards; on a checksum mismatch it reports an error but leaves the rejected archive in place. A later `nvm install --offline` of the same version installs that cached file without a checksum, so an archive that was just rejected gets installed and its `node` and `npm` run. This gives code execution to a party who can alter the downloaded tarball (for example a poisoned CDN or cache object) but cannot also forge the `SHASUMS256.txt` beside it, if the victim runs `nvm install --offline` for that version after the visible \"Checksums do not match\" failure and before any online retry. Version 0.41.0 only puts an archive in the cache once its checksum has passed."}], "id": "CVE-2026-121750", "lastModified": "2026-11-04T22:17:54.873", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 1.4, "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.1, "baseSeverity": "LOW", "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", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "type": "Secondary"}]}, "published": "2026-11-04T22:17:54.873", "references": [{"source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "url": "https://github.com/nvm-sh/nvm/commit/1f99e4c20bb92c5737b92512446acf8e303b1edd"}, {"source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "url": "https://github.com/nvm-sh/nvm/security/advisories/GHSA-262q-c465-prmr"}], "sourceIdentifier": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-459"}, {"lang": "en", "value": "CWE-494"}], "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "type": "Secondary"}]}

{}

{}