CVE-2026-121750 (GCVE-0-2026-121750)

Vulnerability from cvelistv5 – Published: 2026-11-04 21:28 – Updated: 2026-11-04 21:28
VLAI
Title
nvm install --offline installs a cached tarball that previously failed checksum verification
Summary
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.
Severity
2.1 (Low)
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
3.1 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-494 - Download of Code Without Integrity Check
  • CWE-459 - Incomplete Cleanup
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: 0.40.5 , < 0.41.0 (semver)
guessed Create a notification for this product.
Credits
Anthropic's OSS Scanner, as vulnerability ANT-2026-7NCT51FE Jordan Harband (https://github.com/ljharb)
Show details on NVD website
To clipboard 

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              "value": "\u003cp\u003eNode Version Manager (nvm) is a POSIX-compliant shell function for managing multiple node.js versions. In versions 0.40.5 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.\u003c/p\u003e"
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    "dateReserved": "2026-11-03T23:39:03.684Z",
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}



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