CVE-2026-82531
High
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.
SeverityHigh
CVSS8.1
Exploit probability—
ProductSmarty
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-94Code injection
How to fix
Update
- smarty-php smarty4.5.8, 5.8.5 or later
Patches
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| smarty-php smarty | v < 4.5.8, 5.0.0 ≤ v < 5.8.5 | 4.5.8, 5.8.5 |
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