CVE-2026-24131
Medium
Description
pnpm is a package manager. Prior to version 10.28.2, when pnpm processes a package's `directories.bin` field, it uses `path.join()` without validating the result stays within the package root. A malicious npm package can specify `"directories": {"bin": "../../../../tmp"}` to escape the package directory, causing pnpm to chmod 755 files at arbitrary locations. This issue only affects Unix/Linux/macOS. Windows is not affected (`fixBin` gated by `EXECUTABLE_SHEBANG_SUPPORTED`). Version 10.28.2 contains a patch.
SeverityMedium
CVSS5.5
Exploit probability—
ProductPnpm
PublishedJan 26, 2026
First seenJan 26, 2026
Weakness typeCWE-22Path traversalCWE-732CWE-732
How to fix
Update
- pnpm pnpm10.28.2 or later
- pnpm10.28.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pnpm pnpm | v < 10.28.2 | 10.28.2 |
| pnpmnpm | v < 10.28.2 | 10.28.2 |
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