CVE-2026-96355 Drupal CVE debrief

Who should care

Drupal Webform users and administrators should assess exposure and prioritize remediation due to the critical nature of the vulnerability. They should verify Webform versions and configurations to prevent potential unauthorized access and implement additional security measures to monitor and restrict template engine usage.

Why it matters

CVE-2026-96355 is a critical vulnerability in Drupal Webform that allows for remote code execution. Users and administrators should assess exposure, prioritize remediation, and verify Webform versions and configurations to prevent potential unauthorized access.

• Potential remote code execution requires immediate attention and remediation
• Exposure of Webform installations may lead to unauthorized access
• Verification of Webform versions and configurations is necessary

Technical summary

The vulnerability in Drupal Webform allows for remote code execution due to improper neutralization of special elements used in a template engine. Affected versions include those from 0.0.0 to 6.2.12 and from 6.3.0 to 6.3.1. This issue requires immediate attention and remediation to prevent potential unauthorized access. Verification of Webform versions and configurations is necessary to ensure the security of Webform installations.

Defensive priority

High

Recommended defensive actions

• Review and update Webform versions to 6.2.12 or later, or 6.3.1 or later
• Implement additional security measures to monitor and restrict template engine usage
• Verify and limit exposure of Webform installations

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or victim impact. There is no evidence of exploitation in the wild, but defenders should verify Webform versions and configurations to prevent potential unauthorized access. Limited source information is available, and additional verification is required to confirm affected scope and severity.

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.