Bug 2512527 (CVE-2026-62996)

Summary: CVE-2026-62996 php-smarty: Smarty Security stream restriction bypass through stream: resource
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Smarty, a PHP template engine. Smarty's stream resource-name handling does not adequately restrict which PHP stream wrappers and filter chains can be referenced from a template. An attacker able to author or influence a template's resource reference could exploit this by using a php://filter-wrapped resource name to read the contents of arbitrary local files. This could lead to the disclosure of sensitive file contents.
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Description OSIDB Bzimport 2026-08-07 15:21:19 UTC 
Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. From 5.0.0 until 5.8.4, Smarty's stream: resource-name handling does not adequately restrict which PHP stream wrappers and filter chains can be referenced from a template, allowing a php://filter-wrapped resource name to be used to read the contents of arbitrary local files accessible to the PHP process. An attacker able to author or influence a template's resource reference could exploit this to disclose sensitive file contents outside the intended template/config scope. This issue is fixed in version 5.8.4.