{"id":"CVE-2026-118905","aliases":[],"cve":{"records":[{"id":"CVE-2026-118905","source":"harborist","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-29T05:21:07.784Z","published":"2026-10-29T05:22:35.156Z","modified":"2026-10-29T05:22:35.156Z"}],"publishers":[{"name":"harborist","role":"CNA","organizationId":"7ffcee3d-2c14-4c3e-b844-86c6a321a158","modified":"2026-10-29T05:22:35.156Z"}],"references":[{"url":"https://github.com/nvm-sh/nvm/security/advisories/GHSA-vgqf-vc3m-4wv3","tags":["vendor-advisory"],"source":"harborist"},{"url":"https://github.com/nvm-sh/nvm/commit/82315e2b189528a006da6701eac30e8c364ffd22","tags":["patch"],"source":"harborist"},{"url":"https://github.com/nvm-sh/nvm/pull/3854","tags":["patch"],"source":"harborist"},{"url":"https://github.com/nvm-sh/nvm/releases/tag/v0.40.6","tags":["release-notes"],"source":"harborist"}],"weaknesses":[{"id":"CWE-78","description":"CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","source":"harborist"},{"id":"CWE-94","description":"CWE-94 Improper Control of Generation of Code ('Code Injection')","source":"harborist"}],"applicability":[],"prioritization":[]},"title":"nvm_ls lets an untrusted version string inject sed commands, executing arbitrary commands with GNU sed","titleSource":"harborist","descriptionSource":"harborist","description":"Node Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.31.2 through 0.40.5, `nvm_ls` filters installed versions with a sed program that embeds the requested version pattern in a `\\#...#` address, escaping `.` (and, since 0.40.4, `#`) but not backslash. A version string containing `#` (or `\\#`) therefore closes the address early, and the rest of it is parsed as sed commands: with GNU sed, the `e` command runs a shell command as the user; with BSD sed, the `w` and `r` commands write and read files. This is reachable whenever an attacker-influenced version string is passed to `nvm use`, `nvm which`, `nvm ls`, `nvm version`, `nvm run`, or `nvm exec`, or to `nvm-exec` via `NODE_VERSION`, and at least one version is installed. nvm's own `.nvmrc` parser strips comments, so a bare `nvm use` is not affected; however, the bash `cdnvm` and zsh `load-nvmrc` auto-switch hooks documented in the README read `.nvmrc` as-is and pass it to `nvm ls` and `nvm version`, so a user with one of those hooks installed runs the attacker's command just by changing into a directory under a malicious `.nvmrc`; scripts that run `nvm use \"$(cat .nvmrc)\"` are affected the same way. Version 0.40.6 passes any version pattern containing `#` or a newline through the `.nvmrc` content parser first, so no `#` reaches the sed program.","score":7.1,"severity":"high","published":"2026-10-29T05:22:35.156Z","modified":"2026-10-29T05:22:35.156Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"nvm-sh","name":"nvm","platforms":[],"versions":[{"version":"0.31.2","status":"affected","lessThan":"0.40.6","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"harborist","url":"https://www.cve.org/CVERecord?id=CVE-2026-118905"}],"remediation":[{"text":"Upgrade to nvm 0.40.6 or later.","source":"harborist","url":"https://www.cve.org/CVERecord?id=CVE-2026-118905"},{"text":"Until upgrading, do not pass untrusted version strings to nvm, and use nvm's own `.nvmrc` handling (a bare `nvm use`) instead of reading `.nvmrc` yourself, including in shell auto-switch hooks.","source":"harborist","url":"https://www.cve.org/CVERecord?id=CVE-2026-118905"}],"references":["https://github.com/nvm-sh/nvm/security/advisories/GHSA-vgqf-vc3m-4wv3","https://github.com/nvm-sh/nvm/commit/82315e2b189528a006da6701eac30e8c364ffd22","https://github.com/nvm-sh/nvm/pull/3854","https://github.com/nvm-sh/nvm/releases/tag/v0.40.6"],"sources":[{"name":"CVE","id":"CVE-2026-118905","modified":"2026-10-29T05:22:35.156Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-118905"}],"assessments":[{"source":"harborist","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":7.1},{"source":"harborist","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7}],"sourceAffected":[],"observedAt":"2026-10-29T14:37:41.847Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T07:45:30.596Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-10-29T06:10:30.605Z","attemptedAt":"2026-10-29T06:10:30.605Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-29T06:10:30.759Z","attemptedAt":"2026-10-29T06:10:30.759Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T06:10:31.218Z","attemptedAt":"2026-10-29T06:10:31.218Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-29T06:10:30.511Z","attemptedAt":"2026-10-29T06:10:30.511Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-112603","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-112603","modified":"Oct 29, 2026, 5:22:35 AM","score":7.1,"vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","checkedAt":"2026-10-29T06:10:31.218Z"}],"aiSummary":null}