CVE-2026-46633 Twig: PHP code injection via `{% use %}` template name

What is CVE-2026-46633?

CVE-2026-46633 is a high-severity code injection vulnerability in twigphp Twig, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Twig is a template language for PHP. Prior to 3.26.0, Compiler::string() does not escape single quotes when a template name from a {% use %} tag is placed inside a PHP single-quoted string literal, allowing a crafted template name to terminate the string and inject arbitrary PHP expressions into the compiled cache file. This issue is fixed in version 3.26.0.

Weakness: CWE-94

Which versions are affected by CVE-2026-46633?

2 open source packages ship an affected version, including twig/twig. It affects 1 product.

Products include Symfony Twig.

How do I fix CVE-2026-46633?

Upgrade twig/twig to 3.26.0 or later.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-46633 being exploited?

There is no known exploitation of CVE-2026-46633 in the wild and no public exploit code.

Other vulnerabilities in twigphp Twig

• CVE-2018-13818 Code injection in n/a Critical 9.8
• CVE-2026-46640 Twig: Arbitrary PHP code execution via `_self.(<string>)` macro-reference compilation High 8.7
• CVE-2026-24425 Twig 2.16.x & 3.9.0-3.25.x Sandbox Bypass via SourcePolicyInterface High 8.7
• CVE-2024-45411 Twig has a possible sandbox bypass High 8.6
• CVE-2026-46634 Twig: `template_from_string()` escapes a SourcePolicy-driven sandbox via synthesized template name High 7.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-46633, GHSA-7p85-w9px-jpjp, ROOT-APP-COMPOSER-CVE-2026-46633, UBUNTU-CVE-2026-46633.