CVE-2023-43655 (published 2023-09-29T19:33:32.183Z)
Composer is a dependency manager for PHP. Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a php file may be subject to a remote code execution vulnerability if PHP also has `register_argc_argv` enabled in php.ini. Versions 2.6.4, 2.2.22 and 1.10.27 patch this vulnerability. Users are advised to upgrade. Users unable to upgrade should make sure `register_argc_argv` is disabled in php.ini, and avoid publishing composer.phar to the web as this is not best practice.

Affected products: Vendor: composer
Product: composer
Versions: 2.6.4, 2.2.21, 1.10.27, >= 2.0, < 2.2.22, < 1.10.27