CVE-2026-6366: Drupal core allows Object Injection

Published May 19, 2026
·
Updated

Drupal core allows Object Injection

Affected Software

13 affected componentsFixes available
Drupal Drupal Core>=8.0.0<10.5.9, >=10.6.0<10.6.7, >=11.0.0<11.2.11, >=11.3.0<11.3.7
Drupal Drupal>=8.0.0<10.5.9
Drupal Drupal>=10.6.0<10.6.7
Drupal Drupal>=11.0.0<11.2.11
Drupal Drupal>=11.3.0<11.3.7
composer/drupal/core>=11.3.0, <11.3.7
11.3.7
composer/drupal/core>=11.0.0, <11.2.11
11.2.11
composer/drupal/core>=10.6.0, <10.6.7
10.6.7
composer/drupal/core>=8.0.0, <10.5.9
10.5.9
composer/drupal/core>=11.3.0<11.3.7
11.3.7
composer/drupal/core>=11.0.0<11.2.11
11.2.11
composer/drupal/core>=10.6.0<10.6.7
10.6.7
composer/drupal/core>=8.0.0<10.5.9
10.5.9

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade composer/drupal/core to a version that resolves this vulnerability.

    Fixed in 11.3.7
  2. Upgrade

    Upgrade composer/drupal/core to a version that resolves this vulnerability.

    Fixed in 11.2.11
  3. Upgrade

    Upgrade composer/drupal/core to a version that resolves this vulnerability.

    Fixed in 10.6.7
  4. Upgrade

    Upgrade composer/drupal/core to a version that resolves this vulnerability.

    Fixed in 10.5.9

Event History

May 19, 2026
CVE Published
via MITRE·10:27 PM
Data Sourced
via MITRE·10:27 PM
DescriptionWeakness
Data Sourced
via NVD·11:16 PM
DescriptionSeverityWeaknessAffected Software
May 20, 2026
Advisory Published
via GitHub·12:31 AM
Data Sourced
via GitHub·12:31 AM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via Packagist·12:31 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-6366?

CVE-2026-6366 has a medium severity rating of 6.6 based on the CVSS 3.1 scoring system.

2

How do I fix CVE-2026-6366?

To fix CVE-2026-6366, update your Drupal core to versions 10.5.9 or newer, 10.6.7 or newer, or 11.2.11 or newer as applicable.

3

What types of systems are affected by CVE-2026-6366?

CVE-2026-6366 affects Drupal core versions from 8.0.0 before 10.5.9, 10.6.0 before 10.6.7, 11.0.0 before 11.2.11, and 11.3.0 before 11.3.7.

4

What is the impact of CVE-2026-6366?

The impact of CVE-2026-6366 is the potential for Object Injection due to improperly controlled modification of dynamically-determined object attributes.

5

When was CVE-2026-6366 published?

CVE-2026-6366 was published on May 19, 2026.

Company

Resources

Contact

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