CVE-2026-46643

CVE-2026-46643 · Snappy: Binary path is never shell-escaped due to an inverted is_executable check

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 0.2% · Fix available

Published

2026-06-10T19:52:59.944Z

Updated

2026-06-11T16:15:41.695Z

Stack: php

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