CVE-2026-28288

Dify has a user enumeration issue

MEDIUM
5.3
CVSS Score
Published: February 27, 2026 at 08:25 PM UTC
Updated: June 17, 2026 at 10:28 AM UTC
2 products affected across 2 vendorsDifyDify

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.7%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.9.0
v < 1.9.0
Affected range stops below 1.9.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qx
x_refsource_MISCIssue Tracking
Source: cverecord
https://github.com/langgenius/dify/issues/24323

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-204

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