CVE-2026-82531
Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the…
- Risk score
- 65/100
- CVSS
- 8.1 v3.1
- Exploit chance (30 days)
- 0.8%
- Published
- 6 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 regener…
- Affected
- See advisory
- Fix
- Upgrade the product to 4.5.8 or 5.8.5 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.1 high
- Remotely exploitable without logging in
References
- 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
Original 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.
Last activity 6 Oct 2026. Patch Forecast updates every hour.