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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-204"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66002.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "15.115.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "16.0.0-beta.1"
},
{
"fixed": "16.27.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
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],
"source": "REFERENCES_COMMIT"
},
{
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"source": "REFERENCES_COMMIT"
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{
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"source": "REFERENCES_COMMIT"
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{
"original_tag": "v15.115.0",
"range": [
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}
],
"source": "REFERENCES_TAG"
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{
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}
],
"source": "REFERENCES_TAG"
}
]
}