prestashop/ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

10.0 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS

• CVE-2026-54159: 0.75% estimated exploitation activity in the next 30 days; percentile 55.01 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact A PHP Object Injection vulnerability affects the PrestaShop module psfacetedsearch. The module rebuilds the selected search filters from the request URL. The value of a slider filter (price or weight) is taken from the URL without sufficient validation, then stored in an internal filter-block cache where it is serialized and later read back with a raw native unserialize(). By crafting that value, an attacker can smuggle a malicious serialized PHP object into the cache. When it is deserialized, a gadget chain writes an arbitrary PHP file inside the module directory, which is then used as a webshell to run commands on the server. Who is impacted Any shop using a vulnerable version of psfacetedsearch that displays a filter template containing a slider filter (price or weight). Exploitation is remote and unauthenticated, a single crafted front-office request is enough, and leads to remote code execution and full compromise of the shop and its server. Affected versions: 3.0.0…

Published by the source

10 Jul 2026, 20:36 UTC

Last modified by the source

10 Jul 2026, 20:36 UTC

Source last checked

26 Oct 2026, 14:50 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-m5f5-28qr-9g9r

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# Patch Next advisory brief: CVE-2026-54159

Advisory: prestashop/ps_facetedsearch: PHP Object Injection in faceted search cache allows unauthenticated RCE
IDs: CVE-2026-54159, GHSA-m5f5-28qr-9g9r
Record: https://patchnext.com/advisories/cve-2026-54159 (revision 1, source checked 26 Oct 2026, 14:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 10.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: prestashop/ps_facetedsearch 4.0.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist prestashop/ps_facetedsearch: affected >= 3.0.0, < 4.0.4; fixed in 4.0.4

## Suggested inspection (read-only)
- Packagist prestashop/ps_facetedsearch: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on prestashop/ps_facetedsearch.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-m5f5-28qr-9g9r (GitHub-reviewed advisory GHSA-m5f5-28qr-9g9r lists affected ranges: Packagist prestashop/ps_facetedsearch >=3.0.0 <4.0.4)

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