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CVE-2026-54159— ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE

Quick assessment

Affected
PrestaShop ps_facetedsearch
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PrestaShop faceted search module是美国PrestaShop公司开源的一个搜索模块。 PrestaShop Faceted search module 3.0.0版本至4.0.4之前版本存在输入验证错误漏洞，该漏洞源于从请求URL重建搜索过滤器时，对滑块过滤器值验证不足，导致未经验证的攻击者可注入恶意序列化PHP对象，在反序列化后通过小工具链写入任意PHP文件并作为Webshell执行命令。

CVSS 10.0 · Critical EPSS 0.75% · P53

Affected Version Matrix 1

VendorProduct Version RangeStatus
PrestaShop ps_facetedsearch >= 3.0.0, < 4.0.4 affected
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I. Basic Information for CVE-2026-54159

Vulnerability Information
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Vulnerability Title
ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
PrestaShop Faceted search module 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PrestaShop faceted search module是美国PrestaShop公司开源的一个搜索模块。 PrestaShop Faceted search module 3.0.0版本至4.0.4之前版本存在输入验证错误漏洞，该漏洞源于从请求URL重建搜索过滤器时，对滑块过滤器值验证不足，导致未经验证的攻击者可注入恶意序列化PHP对象，在反序列化后通过小工具链写入任意PHP文件并作为Webshell执行命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
PrestaShop ps_facetedsearch >= 3.0.0, < 4.0.4 -

II. Public POCs for CVE-2026-54159

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8674 chars
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III. Intelligence Information for CVE-2026-54159

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Patches & Fixes for CVE-2026-54159 (1)

Vendor Advisories for CVE-2026-54159 (1)

Vendor Pages for CVE-2026-54159 (1)

IV. Related Vulnerabilities

Same product: ps_facetedsearch
Same vendor: PrestaShop
Same weakness: CWE-74

V. Comments for CVE-2026-54159

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