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Description

Dify is an open-source LLM app development platform. Prior to 1.9.0, responses from the Dify API to existing and non-existent accounts differ, allowing an attacker to enumerate email addresses registered with Dify. Version 1.9.0 fixes the issue.

PUBLISHED Reserved 2026-02-26 | Published 2026-02-27 | Updated 2026-02-27 | Assigner GitHub_M




MEDIUM: 5.5CVSS: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:P

Problem types

CWE-204: Observable Response Discrepancy

Product status

< 1.9.0
affected

References

github.com/...s/dify/security/advisories/GHSA-9qpf-wcv3-w3qx

github.com/langgenius/dify/issues/24323

cve.org (CVE-2026-28288)

nvd.nist.gov (CVE-2026-28288)

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