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10.0

CVE-2026-54159: PrestaShop ps_facetedsearch: Unauthenticated Remote Code Execution

GHSA-m5f5-28qr-9g9r CVE-2026-54159 CVE-2026-54159
Summary

A vulnerability in PrestaShop's ps_facetedsearch module allows an attacker to execute code on your server without needing a login. This can happen if you're using a vulnerable version of the module and a customer or attacker crafts a specific URL request. To fix this, you should upgrade the ps_facetedsearch module to the latest version. If you can't upgrade, you can apply a manual fix by changing a line of code in the Block.php file.

What to do
  • Update prestashop ps_facetedsearch to version 4.0.4.
Affected software
Ecosystem VendorProductAffected versions
composer prestashop ps_facetedsearch >= 3.0.0, < 4.0.4
Fix: upgrade to 4.0.4
– prestashop ps_facetedsearch >= 3.0.0, < 4.0.4
Original title
ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE
Original description
PrestaShop ps_facetedsearch is a module that adds layered navigation filters. From 3.0.0 until 4.0.4, the ps_facetedsearch module rebuilds selected search filters from the request URL, and the value of a slider filter, price or weight, is taken from the URL without sufficient validation and stored in an internal filter-block cache where it is serialized and later read back with a raw native unserialize() in src/Filters/Block.php. By crafting that value, an unauthenticated attacker can smuggle a malicious serialized PHP object into the cache, and when it is deserialized, a gadget chain writes an arbitrary PHP file inside the modules/ps_facetedsearch/ directory, which is then used as a webshell to run commands on the server. This issue is fixed in version 4.0.4.
ghsa CVSS3.1 10.0
Vulnerability type
CWE-74 Injection
Published: 17 Jul 2026 · Updated: 20 Jul 2026 · First seen: 10 Jul 2026