CVE-2026-59946
Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files
Description
Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and world-executable mode during composer install, update, or require. This issue is fixed in versions 2.2.29 and 2.10.2.
INFO
Published Date :
July 8, 2026, 8:16 p.m.
Last Modified :
July 8, 2026, 8:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-59946
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Composer to version 2.2.29 or higher.
- Verify package installation 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-2026-59946.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59946 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-2026-59946
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-2026-59946 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59946 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.
-
New CVE Received by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'composer', 'product': 'composer', 'versions': [{'status': 'affected', 'version': '>= 1.0, < 2.2.29'}, {'status': 'affected', 'version': '>= 2.3.0, < 2.10.2'}]}] Added Description Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and world-executable mode during composer install, update, or require. This issue is fixed in versions 2.2.29 and 2.10.2. Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N Added CWE CWE-22 Added CWE CWE-732 Added Reference https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0 Added Reference https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1 Added Reference https://github.com/composer/composer/releases/tag/2.10.2 Added Reference https://github.com/composer/composer/releases/tag/2.2.29 Added Reference https://github.com/composer/composer/security/advisories/GHSA-gjfg-22fp-rrxx