| Package | Affected versions | Patched versions |
|---|---|---|
| twig/twig | ≥ 3.0.0, < 3.26.0 | 3.26.0 |
| twig | ≥ 3.0.0, < 3.26.0 | 3.26.0 |
Twig\Profiler\Dumper\HtmlDumper writes Profile::getTemplate() and Profile::getName() straight into its HTML output without escaping:
protected function formatTemplate(Profile $profile, $prefix): string
{
return \sprintf('%s└ <span style="background-color: %s">%s</span>', $prefix, self::$colors['template'], $profile->getTemplate());
}
The template name comes from the loader (the array key for ArrayLoader, a row id for a database-backed loader, etc.). When that name is attacker-controlled, the profiler dump emits arbitrary HTML, and any browser that renders it executes the injected markup. This is an output-encoding bug in profiler/debug tooling, not a sandbox escape.
HtmlDumper now runs both Profile::getTemplate() and Profile::getName() through htmlspecialchars() before inserting them into the HTML output.
Twig would like to thank El Kharoubi Iosif for reporting the issue and Nicolas Grekas for fixing it.
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