CVE-2026-33674: PrestaShop Improper Use Of Validation Framework Vulnerability

LOW
Advisory Identifier: GHSA-283w-xf3q-788v
Share
CVSS 2.0
CWE-1173
Published
Advisory Summary

CVE-2026-33674 is a LOW (CVSS 2.0) improper use of validation framework vulnerability (CWE-1173: Improper Use of Validation Framework) affecting PrestaShop libraries in the Packagist ecosystem. The issue involves improper use of validation framework. Remediation is available by upgrading affected packages to version 8.2.5, 9.1.0.

CVE-2026-33674 at a Glance

CVE Identifier CVE-2026-33674
GHSA Identifier GHSA-283w-xf3q-788v
Severity LOW
CVSS v3.1 Base Score 2.0
CWE Classification CWE-1173: Improper Use of Validation Framework
Affected Product PrestaShop
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 2.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required High (PR:H)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-33674

To remediate this vulnerability, upgrade all affected PrestaShop dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

prestashop/prestashop fixed: 8.2.5 
Upgrade prestashop/prestashop to 8.2.5
prestashop/prestashop fixed: 9.1.0 
Upgrade prestashop/prestashop to 9.1.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for prestashop/prestashop

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-33674, inspect your project dependencies for PrestaShop:

inspect dependencies for prestashop/prestashop

Analyze the terminal output to locate any version of PrestaShop in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.2.5), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1173: Improper Use of Validation Framework, where the product does not use, or incorrectly uses, an input validation framework that is provided by the source language or an independent library. In PrestaShop, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact Fix improper use of validation framework ### Patches Patched in 8.2.5 and 9.1.0 ### Workarounds None ### References none

CVE-2026-33674 Affected PrestaShop Versions

2 component(s)
Fixed Versions:
8.2.59.1.0
Product / Package Ecosystem Affected Versions Fixed Version
prestashop/prestashop
 Packagist
< 8.2.5
8.2.5
prestashop/prestashop
 Packagist
≥ 9.0.0-alpha.1
< 9.1.0
9.1.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-283w-xf3q-788v
NVD — CVE-2026-33674 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33674
PrestaShop Source Repository REPOSITORY
https://github.com/PrestaShop/PrestaShop
PrestaShop Release RELEASE
https://github.com/PrestaShop/PrestaShop/releases/tag/8.2.5
PrestaShop Release RELEASE
https://github.com/PrestaShop/PrestaShop/releases/tag/9.1.0

Frequently Asked Questions

What is CVE-2026-33674?
CVE-2026-33674 is a security vulnerability in PrestaShop involving Improper Use of Validation Framework under CWE-1173: Improper Use of Validation Framework.
Which PrestaShop versions are affected?
Affected versions include releases prior to 8.2.5, 9.1.0 across affected packages: prestashop/prestashop.
What version fixes CVE-2026-33674?
Upgrading to 8.2.5, 9.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is prestashop/prestashop affected?
Yes, prestashop/prestashop is affected in releases prior to 8.2.5, 9.1.0. Upgrade your dependency to 8.2.5, 9.1.0 or later.
What is the CVSS score of CVE-2026-33674?
CVE-2026-33674 has a CVSS v3.1 base score of 2.0 (LOW) with vector string CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2026-33674?
CVE-2026-33674 is classified under CWE-1173: Improper Use of Validation Framework (The product does not use, or incorrectly uses, an input validation framework that is provided by the source language or an independent library.).
How can I check Packagist dependencies for CVE-2026-33674?
Run the dependency tree command: 'inspect dependencies for prestashop/prestashop'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-283w-xf3q-788v",
  "modified" : "2026-03-27T21:35:37Z",
  "published" : "2026-03-25T19:40:42Z",
  "aliases" : [ "CVE-2026-33674" ],
  "summary" : "PrestaShop: Improper Use of Validation Framework",
  "details" : "### Impact\nFix improper use of validation framework\n\n### Patches\nPatched in 8.2.5 and 9.1.0\n\n### Workarounds\nNone\n\n### References\nnone",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "prestashop/prestashop"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.2.5"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "prestashop/prestashop"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0-alpha.1"
      }, {
        "fixed" : "9.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/PrestaShop/PrestaShop/security/advisories/GHSA-283w-xf3q-788v"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33674"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/PrestaShop/PrestaShop"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PrestaShop/PrestaShop/releases/tag/8.2.5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PrestaShop/PrestaShop/releases/tag/9.1.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1173" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-25T19:40:42Z",
    "nvd_published_at" : "2026-03-26T22:16:30Z"
  }
}