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
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-82531 ↗
- github.com/smarty-php/smarty/commit/1cba51cb813563eb61d963c83d28cd59f26b858d ↗
- github.com/smarty-php/smarty/commit/c0fdd4824aca4f67e814b50703cfee1dfde41414 ↗
- github.com/smarty-php/smarty/releases/tag/v4.5.8 ↗
- github.com/smarty-php/smarty/releases/tag/v5.8.5 ↗
- github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9x ↗
- www.vulncheck.com/advisories/smarty-before-4.5.8-and-5-x-before-5.8.5-php-code-injection-via-extends-inheritance-cache ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.