CVE-2026-82531

Description

Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution.

References

• https://github.com/smarty-php/smarty/commit/1cba51cb813563eb61d963c83d28cd59f26b858d
• https://github.com/smarty-php/smarty/commit/c0fdd4824aca4f67e814b50703cfee1dfde41414
• https://github.com/smarty-php/smarty/releases/tag/v4.5.8
• https://github.com/smarty-php/smarty/releases/tag/v5.8.5
• https://github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9x