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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Newmediacompany Subscribe
Smarty Subscribe

No data.

No data.

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No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/smarty-php/smarty/commit/1cba51cb813563eb61d963c83d28cd59f26b858d cve-icon cve-icon
https://github.com/smarty-php/smarty/commit/c0fdd4824aca4f67e814b50703cfee1dfde41414 cve-icon cve-icon
https://github.com/smarty-php/smarty/releases/tag/v4.5.8 cve-icon cve-icon
https://github.com/smarty-php/smarty/releases/tag/v5.8.5 cve-icon cve-icon
https://github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9x cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/smarty-before-4.5.8-and-5-x-before-5.8.5-php-code-injection-via-extends-inheritance-cache cve-icon cve-icon
History

Tue, 06 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 06 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
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.
Title Smarty before 4.5.8 and 5.x before 5.8.5 PHP Code Injection via extends: Inheritance Cache
First Time appeared Newmediacompany
Newmediacompany smarty
Weaknesses CWE-94
CPEs cpe:2.3:a:newmediacompany:smarty:*:*:*:*:*:*:*:*
Vendors & Products Newmediacompany
Newmediacompany smarty
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-06T12:47:10.950Z

Reserved: 2026-08-29T17:20:57.082Z

Link: CVE-2026-82531

cve-icon Vulnrichment

Updated: 2026-10-06T12:44:53.834Z

cve-icon NVD

Status : Received

Published: 2026-10-06T13:16:50.180

Modified: 2026-10-06T13:16:50.180

Link: CVE-2026-82531

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-06T13:45:18Z

Weaknesses