Arbitrary Code Injection Affecting smarty/smarty package, versions <4.5.8>=5.0.0, <5.8.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published18 Oct 2026
- disclosed6 Oct 2026
- creditUnknown
Introduced: 6 Oct 2026
NewCVE-2026-82531 (opens in a new tab)How to fix?
Upgrade smarty/smarty to version 4.5.8, 5.8.5 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via the extends process in template inheritance when the top-level nocache_hash is not restored, allowing a forged SmartyNocache marker to be injected into the regenerated PHP cache file. An attacker can execute arbitrary PHP code by supplying crafted assigned data that is copied verbatim into the cache file.