CVE-2026-28288

Dify has a user enumeration issue

State: Published
Severity: 5.5 Medium
Published: Feb 27, 2026
Updated: Feb 27, 2026
Reserved: Feb 26, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.5 Medium	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:P	GitHub_M

Weaknesses

CWE-204 Observable Response Discrepancy

Affected Products

Product	Versions
difylanggenius	< 1.9.0Affected

References

https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qx
https://github.com/langgenius/dify/issues/24323

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.