CVE-2026-82531

HIGH

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.

CVSS v3.1 Score

8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 10/6/2026Modified: 10/6/2026

Related Intelligence (0)

No articles currently reference this CVE.

References (7)

https://github.com/smarty-php/smarty/commit/1cba51cb813563eb61d963c83d28cd59f26b858dhttps://github.com/smarty-php/smarty/commit/c0fdd4824aca4f67e814b50703cfee1dfde41414https://github.com/smarty-php/smarty/releases/tag/v4.5.8https://github.com/smarty-php/smarty/releases/tag/v5.8.5https://github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9xhttps://www.vulncheck.com/advisories/smarty-before-4.5.8-and-5-x-before-5.8.5-php-code-injection-via-extends-inheritance-cachehttps://github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9x