CVE-2026-15921

{"id": "CVE-2026-15921", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-15921", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-16T12:53:15.866939Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.1, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 1.6}], "cvssMetricV40": [{"type": "Secondary", "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "affectedData": [{"repo": "https://github.com/nvm-sh/nvm", "vendor": "nvm-sh", "product": "nvm", "versions": [{"status": "affected", "version": "0.32.1", "lessThan": "0.40.6", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-15T22:16:45.717", "references": [{"url": "https://github.com/nvm-sh/nvm/commit/9275c5badda1d9d0cdad6f34598a111033eadb42", "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158"}, {"url": "https://github.com/nvm-sh/nvm/security/advisories/GHSA-4ghp-wxpw-rhpg", "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158"}, {"url": "https://github.com/nvm-sh/nvm/security/advisories/GHSA-4ghp-wxpw-rhpg", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158", "description": [{"lang": "en", "value": "CWE-22"}, {"lang": "en", "value": "CWE-73"}]}], "descriptions": [{"lang": "en", "value": "Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.32.1 through 0.40.5, `nvm ls-remote` (and other commands that refresh remote LTS aliases, such as `nvm install --lts`) parse the node.js mirror's `index.tab` and use each release's LTS codename field as an alias filename without validating it. A malicious, compromised, or man-in-the-middled mirror can return an LTS codename containing path-traversal sequences such as `../../../.bashrc`, causing nvm to write the associated version string to a path outside `$NVM_DIR/alias`. With the default layout (`$NVM_DIR` is `~/.nvm`), this can create or overwrite files in the user's home directory, including shell startup files, which can lead to code execution in a later shell session. Exploitation requires the victim to use a hostile mirror -- via a compromised mirror or CDN, a network man-in-the-middle, or a maliciously configured `NVM_NODEJS_ORG_MIRROR`/`NVM_IOJS_ORG_MIRROR` -- and to run an affected command. Version 0.40.6 validates remote LTS codenames as safe alias filenames and rejects `..` path components when writing alias files."}, {"lang": "es", "value": "Node Version Manager (nvm) es una funci\u00f3n de shell compatible con POSIX para gestionar m\u00faltiples versiones de node.js. En las versiones 0.32.1 a 0.40.5, \u2019nvm ls-remote\u2019 (y otros comandos que actualizan alias LTS remotos, como \u2019nvm install --lts\u2019) analizan el \u2019index.tab\u2019 del mirror de node.js y usan el campo de nombre en clave LTS de cada lanzamiento como un nombre de archivo de alias sin validarlo. Un mirror malicioso, comprometido o con un ataque de man-in-the-middle puede devolver un nombre en clave LTS que contenga secuencias de path-traversal como \u2019.. / .. / .. / .bashrc\u2019, haciendo que nvm escriba la cadena de versi\u00f3n asociada a una ruta fuera de \u2019$NVM_DIR/alias\u2019. Con la configuraci\u00f3n predeterminada (\u2019$NVM_DIR\u2019 es \u2019~/.nvm\u2019), esto puede crear o sobrescribir archivos en el directorio de inicio del usuario, incluidos los archivos de inicio de shell, lo que puede llevar a la ejecuci\u00f3n de c\u00f3digo en una sesi\u00f3n de shell posterior. La explotaci\u00f3n requiere que la v\u00edctima use un mirror hostil -- a trav\u00e9s de un mirror o CDN comprometido, un man-in-the-middle de red, o un \u2019NVM_NODEJS_ORG_MIRROR\u2019/\u2019NVM_IOJS_ORG_MIRROR\u2019 configurado maliciosamente -- y que ejecute un comando afectado. La versi\u00f3n 0.40.6 valida los nombres en clave LTS remotos como nombres de archivo de alias seguros y rechaza los componentes de ruta \u2019..\u2019 al escribir archivos de alias."}], "lastModified": "2026-10-24T21:10:00.130", "sourceIdentifier": "7ffcee3d-2c14-4c3e-b844-86c6a321a158"}