GHSA-mh4h-27gq-cxwj
MEDIUMGHSA-mh4h-27gq-cxwj is a medium-severity (CVSS 4.3) vulnerability in drupal/core. O3 Security confirms whether GHSA-mh4h-27gq-cxwj is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Drupal core Access bypass
Blast Radius
drupal/core🐘drupal/coreReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
The Media Library module has a security vulnerability whereby it doesn't sufficiently restrict access to media items in certain configurations.
Solution: If you are using Drupal 8.7.x, you should upgrade to Drupal 8.7.11. If you are using Drupal 8.8.x, you should upgrade to Drupal 8.8.1. Versions of Drupal 8 prior to 8.7.x are end-of-life and do not receive security coverage.
Alternatively, you may mitigate this vulnerability by unchecking the "Enable advanced UI" checkbox on /admin/config/media/media-library. (This mitigation is not available in 8.7.x.)
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | drupal/core | ≥ 8.0.0&&< 8.7.11 | 8.7.11 |
| 🐘Packagist | drupal/core | ≥ 8.8.0&&< 8.8.1 | 8.8.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/core. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update drupal/core to 8.7.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mh4h-27gq-cxwj is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-mh4h-27gq-cxwj is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-mh4h-27gq-cxwj. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-mh4h-27gq-cxwj in your dependencies?
O3 detects GHSA-mh4h-27gq-cxwj across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.