CVE-2026-55700

pnpm: stage download writes outside destination via manifest version traversal

State: Published
Severity: 7.1 High
Published: Jun 25, 2026
Updated: Jun 25, 2026
Reserved: Jun 17, 2026

Description

pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm stage download` derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-73 External Control of File Name or Path

Affected Products

Product	Versions
pnpmpnpm	>= 11.3.0, < 11.5.3Affected

References

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