CVE-2026-82531
Published:October 06, 2026
Updated:October 09, 2026
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.
Affected Packages
https://github.com/smarty-php/smarty.git (GITHUB):
Affected version(s) >=v5.2.0 <v5.8.5Fix Suggestion:
Update to version v5.8.5smarty/smarty (PHP):
Affected version(s) >=v5.2.0 <v5.8.5Fix Suggestion:
Update to version v5.8.5smarty/smarty (PHP):
Affected version(s) >=v4.5.3 <v4.5.8Fix Suggestion:
Update to version v4.5.8Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Control of Generation of Code ('Code Injection')
EPSS
Base Score:
0.82