CVE-2026-59196Network attack vector

File overwrite via unchecked hoisted lockfile alias

Published Jul 6, 2026 · Updated Jul 6, 2026

Path traversal in pnpm before 10.34.4 and 11.0.0 through 11.6.2 allows remote attackers to write files via a crafted lockfile alias. The lockfileToHoistedDepGraph dep.name sink joins an unvalidated alias beneath node_modules without enforcing package-name or path-containment rules. A user must run a hoisted install on the attacker-controlled lockfile; traversal writes outside the install root, while .bin or .pnpm aliases overwrite pnpm-owned layout.

CVSS severity7.1
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in pnpm before 10.34.4 and 11.0.0 through 11.6.2 allows remote attackers to write files via a crafted lockfile alias. The lockfileToHoistedDepGraph dep.name sink joins an unvalidated alias beneath node_modules without enforcing package-name or path-containment rules. A user must run a hoisted install on the attacker-controlled lockfile; traversal writes outside the install root, while .bin or .pnpm aliases overwrite pnpm-owned layout.

The record

CVE
CVE-2026-59196
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
pnpm
Product
pnpm
Classifications
CWE-73, CWE-22, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.34.4
  2. Affected versionversion=>= 11.0.0, < 11.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pnpm · pnpmversion=< 10.34.4; version=>= 11.0.0, < 11.7.0

Published CVSS scores

7.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-73External Control of File Name or Path
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo