Vulnerability in prestashop/ps_facetedsearch (CVE-2026-54159)
Summary
Vulnerability in prestashop/ps_facetedsearch (CVE-2026-54159). Successful exploitation can lead to full system takeover. Exploitable via ps_facetedsearch. Mitigation: upgrade to 4.0.4 or later.
Original description
The description as published by the source.
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: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-54159 has been found in prestashop/ps_facetedsearch.
Attackers can target a specific entry point like ps_facetedsearch over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 10.0/10.
What to do: upgrade prestashop/ps_facetedsearch to 4.0.4 or later.
If unsure, ask your IT team or search "prestashop/ps_facetedsearch CVE-2026-54159" on the vendor's site.
CVE-2026-54159 (prestashop/ps_facetedsearch) — CWE-74 / CVSS v3 10.0
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: ps_facetedsearch
Patched: 4.0.4 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-74) exists in prestashop/ps_facetedsearch. Attackers reach the vulnerable code path via ps_facetedsearch without authentication.
Check the vendor advisory for the affected versions of prestashop/ps_facetedsearch. Attack surface: ps_facetedsearch.
Severity: Critical (CVSS 10.0/10). Successful exploitation can lead to full system takeover.
Update to 4.0.4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'prestashop/ps_facetedsearch' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'prestashop/ps_facetedsearch' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
prestashop/ps_facetedsearchを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade prestashop/ps_facetedsearch to 4.0.4ステージング環境で 4.0.4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com
- web github.com
- web github.com