CVE-2026-82531 Smarty - Code Injection

Smarty < 4.5.8 and 5.x < 5.8.5 contain a code injection vulnerability caused by improper restoration of top-level nocache_hash during multi-component template inheritance, letting attackers execute arbitrary PHP code remotely, exploit requires crafted assigned data with forged SmartyNocache marker.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.82% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Code Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
6 October 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Upgrade to versions 4.5.8, 5.8.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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