Incorrect Authorization Vulnerability in Drupal Webform REST
CVE-2026-16644

9.1CRITICAL

Key Information:

Vendor

Drupal
Status
Webform Rest
Vendor
CVE Published:
25 August 2026

What is CVE-2026-16644?

An incorrect authorization vulnerability in the Drupal Webform REST component allows attackers to perform forceful browsing. This security flaw affects multiple versions, enabling unauthorized access to webform submissions and sensitive data. It is essential for users to update to the latest version to mitigate this risk.

Affected Version(s)

Webform REST 0.0.0 < 4.1.0

References

https://www.drupal.org/sa-contrib-2026-087

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Giuseppe (giuseppe87)
Dan Chadwick (danchadwick)
Giuseppe (giuseppe87)
Jacob Rockowitz (jrockowitz)
Liam Morland (liam morland)
Nelson Alves (nsalves)
Anna Kalata (akalata)
cilefen (cilefen)
Greg Knaddison (greggles)
Michael Hess (mlhess)
Juraj Nemec (poker10)
.