CVE-2026-55804 Drupal CVE debrief

Who should care

Users of Drupal core versions from 0.0.0 to 10.5.12, 10.6.0 to 10.6.11, 11.2.0 to 11.2.14, and 11.3.0 to 11.3.12 should be aware of this vulnerability and take necessary actions to mitigate potential Object Injection risks. This includes reviewing and applying patches or updates from the vendor and monitoring systems using Drupal core for any suspicious activity.

Technical summary

The vulnerability, CVE-2026-55804, is caused by Improperly Controlled Modification of Dynamically-Determined Object Attributes in Drupal core. This issue may allow for Object Injection attacks. The affected versions are Drupal core from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, and from 11.3.0 to 11.3.12. To mitigate potential risks, users should review and apply patches or updates from the vendor and monitor systems using Drupal core for any suspicious activity.

Defensive priority

High priority should be given to updating Drupal core to a version outside the affected ranges, as Object Injection can lead to significant security risks.

Recommended defensive actions

• Update Drupal core to a version outside the affected ranges (from 0.0.0 to 10.5.12, 10.6.0 to 10.6.11, 11.2.0 to 11.2.14, and 11.3.0 to 11.3.12).
• Review and apply any available patches or updates from the vendor.
• Monitor systems using Drupal core for any suspicious activity.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record was published on 2026-07-10T22:16:43.353Z and has not been modified since then. The NVD entry is currently Received. Limited information is available, and further investigation is recommended. The source item URL and CVE record provide additional context for understanding the vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.