Bug 2500735 (CVE-2026-49981)

Summary: CVE-2026-49981 twig/twig: Twig: Information disclosure via sandbox bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Twig, a template language for PHP. An attacker with low privileges could exploit a caching issue in the template sandboxing mechanism. This allows a sandboxed template to bypass its intended security policy, potentially leading to unauthorized information disclosure and limited data manipulation.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2500878, 2500881    
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Description OSIDB Bzimport 2026-07-14 22:03:31 UTC 
Twig is a template language for PHP. Prior to 3.27.0, the per-template filter, tag, and function allow-list verdict is computed when a Template instance is constructed and can remain cached after sandbox state changes between renders, allowing a later sandboxed render to reuse a template that was originally checked with a different or empty policy. This issue is fixed in version 3.27.0.