What’s Vulnerable › Vulnerabilities

CVE-2026-66002: Frappe: User Enumeration via PDDR

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-20 · updated 2026-10-26
• Weakness: CWE-204

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.

Affected products

• frappe: before 15.115.0; from 16.0.0-beta.1, < 16.27.0

References

• https://github.com/frappe/frappe/commit/30fe0b4118ff94c95c239dce4bc74ec4ca10a827
• https://github.com/frappe/frappe/commit/47a396ec59f5362029feb349eb2b9d10a21afcf8
• https://github.com/frappe/frappe/commit/4b32a4e0072e61ce0abcb0d09cfd1f14724fe896
• https://github.com/frappe/frappe/pull/40787
• https://github.com/frappe/frappe/pull/40814
• https://github.com/frappe/frappe/pull/40815
• https://github.com/frappe/frappe/releases/tag/v15.115.0
• https://github.com/frappe/frappe/releases/tag/v16.27.0
• https://github.com/frappe/frappe/security/advisories/GHSA-c2xv-c53h-qvr5

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