CVE-2026-40261— Composer has Command Injection via Malicious Perforce Reference

Composer has Command Injection via Malicious Perforce Reference

Composer is a dependency manager for PHP. Versions 1.0 through 2.2.26 and 2.3 through 2.9.5 contain a command injection vulnerability in the Perforce::syncCodeBase() method, which appends the $sourceReference parameter to a shell command without proper escaping, and additionally in the Perforce::generateP4Command() method as in GHSA-wg36-wvj6-r67p / CVE-2026-40176, which interpolates user-supplied Perforce connection parameters (port, user, client) from the source url field without proper escaping. An attacker can inject arbitrary commands through crafted source reference or source url values containing shell metacharacters, even if Perforce is not installed. Unlike CVE-2026-40176, the source reference and url are provided as part of package metadata, meaning any compromised or malicious Composer repository can serve package metadata declaring perforce as a source type with malicious values. This vulnerability is exploitable when installing or updating dependencies from source, including the default behavior when installing dev-prefixed versions. This issue has been fixed in Composer 2.2.27 (2.2 LTS) and 2.9.6 (mainline). If developers are unable to immediately update, they can avoid installing dependencies from source by using --prefer-dist or the preferred-install: dist config setting, and only use trusted Composer repositories as a workaround.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

OS命令中使用的特殊元素转义处理不恰当(OS命令注入)

Composer 安全漏洞

Composer是Composer开源的一个应用软件。提供一个声明，管理和安装PHP项目的依赖项。 Composer 1.0至2.2.26版本和2.3至2.9.5版本存在安全漏洞，该漏洞源于Perforce::syncCodeBase和Perforce::generateP4Command方法存在命令注入问题，可能导致命令执行。

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