CVE-2026-41249: Coreshop/core shop Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q58j-g3f4-h26h",
  "modified" : "2026-06-09T11:55:16Z",
  "published" : "2026-05-14T13:18:16Z",
  "aliases" : [ "CVE-2026-41249" ],
  "summary" : "CoreShop Vulnerable to Remote Code Execution (RCE) via Insecure `pull_request_target` Configuration",
  "details" : "### Summary\n\nThe GitHub Actions workflow (`.github/workflows/static.yml`) uses the `pull_request_target` trigger but dangerously checks out the unverified code from the pull request head (`ref: ${{ github.event.pull_request.head.ref }}`). Subsequently, it executes a script (`bin/console`) from this untrusted checkout.\nThis allows any external attacker to achieve Remote Code Execution (RCE) on the GitHub Actions runner simply by submitting a malicious Pull Request. Also known as a \"Pwn Request\" vulnerability.\n\n**Steps to Reproduce:**\n1. Fork the target repository.\n2. In the forked repository, modify a file that satisfies the `paths` condition (e.g., `src/dummy.php` or `composer.json`) to trigger the workflow.\n3. Modify the `bin/console` file (which is executed in the workflow steps) with the following malicious payload:\n```bash\n#!/bin/bash\necho \"=== PWNED ===\"\necho \"whoami:\"\nwhoami\n```\n4. Commit the changes and open a Pull Request against the `5.0` or `next` branch of the base repository.\n5. The `Static Tests` workflow will trigger automatically. Navigate to the Actions tab and inspect the logs for the `Validate YAML` (or any step executing `bin/console`).\n6. You will see the output of `whoami` (typically `runner`), proving that the arbitrary code was successfully executed in the runner's context.\n\n<img width=\"490\" height=\"87\" alt=\"スクリーンショット 2026-04-14 11 14 56\" src=\"https://github.com/user-attachments/assets/94276033-b989-46dc-b4a1-3dafa1603235\" />\n\n\n**Impact:**\nBecause `pull_request_target` runs in the context of the base repository, the runner has access to repository secrets (e.g., `PIMCORE_SECRET`, `PIMCORE_PRODUCT_KEY`) loaded in the environment. An attacker can exfiltrate these secrets, modify repository contents (if the token has write permissions), or abuse the runner's computing resources.\n\n**Recommended Mitigation:**\nDo not checkout untrusted PR code (`head.ref`) when using `pull_request_target` if the code will be built or executed.\nConsider adopting a separated architecture using the `workflow_run` event:\n1. Use the `pull_request` event to safely run the build/tests in an unprivileged sandbox and upload artifacts.\n2. Use the `workflow_run` event (which is privileged) to download the artifacts and perform actions requiring secrets.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "coreshop/core-shop"
    },
    "versions" : [ "5.0.0" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/coreshop/CoreShop/security/advisories/GHSA-q58j-g3f4-h26h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-41249"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/coreshop/CoreShop/commit/cc1e3f547228ec5ebfc1dc0472f9a3cc5f4137a4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/coreshop/CoreShop"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/coreshop/CoreShop/blob/5.1.0-beta.1/.github/workflows/static.yml#L14"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-14T13:18:16Z",
    "nvd_published_at" : "2026-06-04T20:16:57Z"
  }
}