CVE-2026-66002: Frappe

Medium severity, CVSS 6.9. EPSS: 0.8% chance of exploitation in the next 30 days.

Frappe is a full-stack web application framework. Prior to 15.115.0 and 16.27.0, the public request-data web form and PersonalDataDownloadRequest class in frappe/website/doctype/personal_data_download_request/personal_data_download_request.py return distinguishable response shapes for registered and unregistered email addresses, including the user_name field and persistence behavior. A remote attacker can compare the responses to enumerate registered users. This issue is fixed in versions 15.115.0 and 16.27.0.

Affected products

• Frappe Frappe: before 15.115.0 (fixed in 15.115.0); from 16.0.0-beta.1, before 16.27.0 (fixed in 16.27.0)

Published 2026-08-20. Last modified 2026-09-10.