CVE-2026-59946

MEDIUM

Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 6.1
EPSS 0.0014
EPSS Percentile 4.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-22 CWE-732
Status published
Products (4)
composer/composer 1.0.0 - 2.2.29Packagist
composer/composer 2.3.0 - 2.10.2Packagist
composer/composer >= 1.0, < 2.2.29
composer/composer >= 2.3.0, < 2.10.2
Published Jul 08, 2026
Tracked Since Jul 09, 2026