CVE-2026-55700 Details
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.
A vulnerability in pnpm, a package manager, exists in versions 11.3.0 prior to 11.5.3. The issue arises in the 'pnpm stage download' command, which improperly derives local filenames from registry-controlled package names and version fields. This flaw allows a crafted manifest to escape the intended download directory and overwrite another accessible file. The vulnerability is rooted in inadequate validation of package names and versions, enabling directory traversal. Exploitation requires crafting a manifest that manipulates the filename resolution process to target files outside the designated download directory.
Users can upgrade to pnpm version 11.5.3 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/pnpm/pnpm/pull/12303 | [email protected] | Patch |
| https://github.com/pnpm/pnpm/security/advisories/GHSA-v23m-ccfg-pq9h | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
| CWE-73 | External Control of File Name or Path | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| pnpm pnpm | >= 11.3.0, < 11.5.3 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 29, 2026 | Initial Analysis | [email protected] |
| Jun 25, 2026 | CVE Modified | CISA-ADP |
| Jun 25, 2026 | New CVE Received | [email protected] |