Arbitrary file write and deletion via patch traversal
Published Jun 25, 2026 · Updated Jun 25, 2026
Path traversal in pnpm before 10.34.0 and pnpm 11 before 11.4.0 allows remote authenticated users to write or delete local files. The @pnpm/patch-package parser accepts ../../ paths from diff --git headers without validation, and executeEffects writes or unlinks those paths outside the package directory. Exploitation requires an accepted patch-bearing pull request and a subsequent pnpm install; impact is limited to files writable by that process account.
Summary
What happened
Path traversal in pnpm before 10.34.0 and pnpm 11 before 11.4.0 allows remote authenticated users to write or delete local files. The @pnpm/patch-package parser accepts ../../ paths from diff --git headers without validation, and executeEffects writes or unlinks those paths outside the package directory. Exploitation requires an accepted patch-bearing pull request and a subsequent pnpm install; impact is limited to files writable by that process account.
The record
- CVE
- CVE-2026-50015
- Published
- Jun 25, 2026
- Updated
- Jun 25, 2026
- Vendor
- pnpm
- Product
- pnpm
- Classifications
- CWE-22, T1204.002
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 25, 2026CVE publishedPublication date reported by the CVE source.
- Jun 25, 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.
- Affected versionversion=< 10.33.4
- Affected versionversion=>= 11.0.0, < 11.4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- AutoFyn patch traversal exploit scriptsproof of concept · demonstrated
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