Improper Encoding or Escaping of Output Affecting twig/cssinliner-extra package, versions <3.26.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PHP-TWIGCSSINLINEREXTRA-16875125
- published26 May 2026
- disclosed21 May 2026
- creditClaude Mythos
Introduced: 21 May 2026
CVE-2026-46637 (opens in a new tab)How to fix?
Upgrade twig/cssinliner-extra to version 3.26.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Encoding or Escaping of Output in the html_to_markdown, markdown_to_html, and inline_css filters due to incorrect declaration of output safety. An attacker can inject unescaped HTML or script content by supplying specially crafted input that is processed by these filters and then rendered in a sensitive context, such as within a JavaScript string or URL parameter.