CVE-2026-46643— Snappy 操作系统命令注入漏洞

Snappy: Binary path is never shell-escaped due to an inverted is_executable check

Snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page. Prior to version 1.7.1, on POSIX, escapeshellarg(‘/usr/bin/wkhtmltopdf’) returns the literal string ‘/usr/bin/wkhtmltopdf’ with the single-quote characters included. is_executable() then looks for a file whose actual name contains those quote characters, which essentially never exists. The safe branch is dead code and $command always falls through to the raw, unescaped value. The rest of the arguments (options, input, output) are escaped correctly, so injection has to land in the binary string itself. That happens whenever the binary path is sourced from configuration that is user-influenced, derived from environment variables that ultimately come from request data, or concatenated with any user-controlled fragment. This issue has been patched in version 1.7.1.

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OS命令中使用的特殊元素转义处理不恰当(OS命令注入)

Snappy 操作系统命令注入漏洞

Snappy是KNP Labs个人开发者的一个 PHP 库，允许从 url 或 html 页面生成缩略图、快照或 PDF。 Snappy 1.7.1之前版本存在操作系统命令注入漏洞，该漏洞源于POSIX系统上escapeshellarg函数返回包含单引号的字符串，导致二进制路径未转义，可能允许注入攻击。

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