Medium severity · published Aug 20, 2026
CVE-2026-66002
Frappe: User Enumeration via PDDR
6.9
CVSS
0.8%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
frappe · frappe
< 15.115.0; >= 16.0.0-beta.1, < 16.27.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-66002
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-66002
github.com
https://github.com/frappe/frappe/commit/30fe0b4118ff94c95c239dce4bc74ec4ca10a827
github.com
https://github.com/frappe/frappe/commit/47a396ec59f5362029feb349eb2b9d10a21afcf8
github.com
https://github.com/frappe/frappe/commit/4b32a4e0072e61ce0abcb0d09cfd1f14724fe896
github.com
https://github.com/frappe/frappe/pull/40787
github.com
https://github.com/frappe/frappe/pull/40814
github.com
https://github.com/frappe/frappe/pull/40815
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