Drupal core 11.3.12 Object Injection via Attribute Modification
CVE-2026-55803 Published on July 10, 2026
Drupal core - Critical - PHP object injection - SA-CORE-2026-005
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Drupal core allows Object Injection. This issue affects Drupal core versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to 11.3.12, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*.
Vulnerability Analysis
CVE-2026-55803 can be exploited with network access, and requires user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a Mass Assignment Vulnerability?
The software receives input from an upstream component that specifies multiple attributes, properties, or fields that are to be initialized or updated in an object, but it does not properly control which attributes can be modified.
CVE-2026-55803 has been classified to as a Mass Assignment vulnerability or weakness.
Products Associated with CVE-2026-55803
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Affected Versions
Drupal core:- Version 0.0.0 and below 10.5.12 is affected.
- Version 10.6.0 and below 10.6.11 is affected.
- Version 11.2.0 and below 11.2.14 is affected.
- Version 11.3.0 and below 11.3.12 is affected.
- Version 0.0.0 and below 11.0.* is affected.
- Version 0.0.0 and below 11.1.* is affected.