CVE-2026-66002

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.

CVSS

No CVSS.

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-20 19:16

Updated : 2026-09-10 20:48

NVD link : CVE-2026-66002

Mitre link : CVE-2026-66002

CVE.ORG link : CVE-2026-66002

JSON object : View

Products Affected

No product.

CWE

CWE-204

Observable Response Discrepancy

{"id": "CVE-2026-66002", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-66002", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-21T21:09:35.845729Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "frappe", "product": "frappe", "versions": [{"status": "affected", "version": "< 15.115.0"}, {"status": "affected", "version": ">= 16.0.0-beta.1, < 16.27.0"}]}]}], "published": "2026-08-20T19:16:58.187", "references": [{"url": "https://github.com/frappe/frappe/commit/30fe0b4118ff94c95c239dce4bc74ec4ca10a827", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/commit/47a396ec59f5362029feb349eb2b9d10a21afcf8", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/commit/4b32a4e0072e61ce0abcb0d09cfd1f14724fe896", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/pull/40787", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/pull/40814", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/pull/40815", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/releases/tag/v15.115.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/releases/tag/v16.27.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/frappe/frappe/security/advisories/GHSA-c2xv-c53h-qvr5", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-204"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-10T20:48:30.570", "sourceIdentifier": "security-advisories@github.com"}