EUVD-2026-93376Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable and unauthenticated (AV:N/PR:N), but the required inheritance+caching path, cache eviction and fresh-process reload make it AC:H; successful PHP RCE gives full C:H/I:H/A:H with no scope change.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 2
AnalysisAI
PHP code injection in the Smarty templating engine allows remote code execution in applications running Smarty 4.x before 4.5.8 or 5.x before 5.8.5 that render templates through the extends:/multi-component inheritance path with caching enabled. When such a template is compiled, the top-level unifunc never restores its nocache_hash, so the value is null; combined with an empty regex alternative in the cache-split logic, attacker-controlled assigned data containing a forged /*%%SmartyNocache:%%*/ marker is copied verbatim (bypassing PHP-tag neutralization) into the regenerated PHP cache file and executed on the next include. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires all of: (1) templates rendered via the extends:/multi-component inheritance path (not single-file templates); (2) caching enabled (e.g. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-priority vulnerability, but one whose real-world exploitability is gated by several preconditions that the raw 9.2 CVSS score obscures. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: upgrade to Smarty 4.5.8 or Smarty 5.8.5 (or later). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every application that embeds Smarty and determine which ones render extends/inheritance-path templates with caching enabled and unescaped attacker-influenced output, since only those configurations are exposed; for any internet-facing system that cannot be patched immediately, disable template caching and purge compiled and cached template files as a stopgap. …
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External POC / Exploit Code
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