{"id":"GHSA-q58j-g3f4-h26h","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\u003cimg 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\" /\u003e\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.","aliases":["CVE-2026-41249"],"modified":"2026-09-10T03:51:06.807111227Z","published":"2026-05-14T13:18:16Z","database_specific":{"github_reviewed_at":"2026-05-14T13:18:16Z","nvd_published_at":"2026-06-04T20:16:57Z","cwe_ids":["CWE-94"],"severity":"HIGH","github_reviewed":true},"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"}],"affected":[{"package":{"name":"coreshop/core-shop","ecosystem":"Packagist","purl":"pkg:composer/coreshop/core-shop"},"versions":["5.0.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-q58j-g3f4-h26h/GHSA-q58j-g3f4-h26h.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"}]}