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Medium, CVSS 4.3

Drupal core Access bypass

GHSA-mh4h-27gq-cxwj

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (drupal/core 8.8.1, 8.7.11), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist drupal/core

    Affected
    >= 8.0.0, < 8.7.11>= 8.8.0, < 8.8.1
    Fixed in
    8.7.11, 8.8.1

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
4.3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

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.)

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-mh4h-27gq-cxwj

Agent brief

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# Patch Next advisory brief: GHSA-mh4h-27gq-cxwj

Advisory: Drupal core Access bypass
IDs: GHSA-mh4h-27gq-cxwj
Record: https://patchnext.com/advisories/ghsa-mh4h-27gq-cxwj (revision 1, source checked 26 Oct 2026, 14:24 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: drupal/core 8.8.1, 8.7.11. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist drupal/core: affected >= 8.0.0, < 8.7.11; >= 8.8.0, < 8.8.1; fixed in 8.7.11, 8.8.1

## Suggested inspection (read-only)
- Packagist drupal/core: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on drupal/core.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-mh4h-27gq-cxwj (GitHub-reviewed advisory GHSA-mh4h-27gq-cxwj lists affected ranges: Packagist drupal/core >=8.0.0 =8.8.0 <8.8.1)

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