CVE-2026-55699: pnpm: reserved bin name deletes PNPM_HOME during global remove

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-06-25 · updated 2026-06-29
Weakness: CWE-22

Description

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3.

Affected products

pnpm: before 10.34.2; from 11.0.0 before 11.5.3 — fixed in 10.34.2, 11.5.3

How to fix

Upgrade to a fixed version: pnpm 10.34.2, 11.5.3. Check the vendor advisory for mitigations.

References

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