Vulnerability · Published Jul 17, 2026 · Assigned by GitHub_M
CVE-2026-54159ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE
Critical 10.0
In plain English
A critical-severity injection in ps_facetedsearch from PrestaShop. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | prestashop/ps_facetedsearch | 4.0.4 | GHSA-m5f5-28qr-9g9r |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PrestaShop | ps_facetedsearch | >= 3.0.0, < 4.0.4 |
Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/PrestaShop/ps_facetedsearch/security/advisories/GHSA-m5f5-28qr-9g9r x_refsource_CONFIRM
- https://github.com/PrestaShop/ps_facetedsearch/commit/9ca839fac68a60641d8187a3ff9730ab09af33cb x_refsource_MISC
- https://github.com/PrestaShop/ps_facetedsearch/releases/tag/v4.0.4 x_refsource_MISC