pnpm: hoisted install imports lockfile alias outside node_modules

published 2026-06-27 4 mo ago modified 2026-07-08 4 mo ago also GHSA-fr4h-3cph-29xv , EUVD-2026-41882

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits: 0; none known

pnpm is a package manager. Prior to 10.34.4 and 11.7.0, a crafted lockfile alias could be joined directly under a hoisted node_modules directory. Traversal aliases could escape that directory, while reserved aliases such as .bin or .pnpm could overwrite pnpm-owned layout. This vulnerability is fixed in 10.34.4 and 11.7.0.

Patch / fix

fixed in 2

npm pnpm 10.34.4, 11.7.0
pnpm pnpm 10.34.4, 11.7.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-59196 updated 2026-09-02 cvss 7.1

pnpm: pnpm: hoisted install imports lockfile alias outside node_modules

Red Hat AMQ Broker 7 pnpm 8.10.0
not affected: vulnerable code not present
Red Hat Build of Keycloak pnpm 8.10.0
not affected: component not present
Red Hat JBoss Enterprise Application Platform 8 pnpm 8.10.0 Red Hat JBoss Enterprise Application Platform Expansion Pack pnpm 8.10.0
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 4 mo ago (2026-07-06)

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/pnpm/pnpm/security/advisories/GHSA-fr4h-3cph-29xv referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L
GitHub	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

Affected packages

ecosystem	package	affected	fixed in
npm	pnpm	<10.34.4 >=11.0.0, <11.7.0	10.34.4 11.7.0

Affected products

pnpm pnpm

Classification

Weakness

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

References

github.com /pnpm/pnpm/security/advisories/GHSA-fr4h-3cph-29xv
web, vendor-advisory, exploit
github.com /pnpm/pnpm
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary