CVE-2026-66002 Frappe: User Enumeration via PDDR
Remote attackers can enumerate registered users by analyzing response differences in public data request forms, exposing user existence.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-66002?
CVE-2026-66002 is a medium-severity vulnerability in frappe, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-204
Which versions are affected by CVE-2026-66002?
How do I fix CVE-2026-66002?
No fix has been published for CVE-2026-66002 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-66002 being exploited?
There is no known exploitation of CVE-2026-66002 in the wild and no public exploit code.
Sources
Also known as GHSA-c2xv-c53h-qvr5.