CVE-2026-82531

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 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://www.vulncheck.com/advisories/smarty-before-4.5.8-and-5-x-before-5.8.5-php-code-injection-via-extends-inheritance-cache
https://github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9x

Configurations

No configuration.

History

06 Oct 2026, 13:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-06 13:16

Updated : 2026-10-06 16:00

NVD link : CVE-2026-82531

Mitre link : CVE-2026-82531

CVE.ORG link : CVE-2026-82531

JSON object : View

Products Affected

No product.

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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