CVE-2026-55699
pnpm: reserved bin name deletes PNPM_HOME during global remove
Description
pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3.
INFO
Published Date :
June 25, 2026, 6:16 p.m.
Last Modified :
June 29, 2026, 9:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update pnpm to version 10.34.2 or 11.5.3.
- Remove any globally installed malicious packages.
- Verify global bin directory integrity.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-55699.
| URL | Resource |
|---|---|
| https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4 | Exploit Vendor Advisory |
| https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-55699 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-55699
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-55699 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-55699 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 29, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:* versions up to (excluding) 10.34.2 *cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:* versions from (including) 11.0.0 up to (excluding) 11.5.3 Added Reference Type GitHub, Inc.: https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4 Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 25, 2026
Action Type Old Value New Value Added Reference https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4 Added SSVC {'id': 'CVE-2026-55699', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-25T17:54:13.594963Z'} -
New CVE Received by [email protected]
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'pnpm', 'product': 'pnpm', 'versions': [{'status': 'affected', 'version': '< 10.34.2'}, {'status': 'affected', 'version': '>= 11.0.0, < 11.5.3'}]}] Added Description pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CWE CWE-22 Added CWE CWE-73 Added Reference https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4