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Vulnerability Details :

CVE-2026-28288

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-27 Feb, 2026 | 20:25
Updated At-27 Feb, 2026 | 20:45
Rejected At-
Credits

Dify has a user enumeration issue

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:27 Feb, 2026 | 20:25
Updated At:27 Feb, 2026 | 20:45
Rejected At:
▼CVE Numbering Authority (CNA)
Dify has a user enumeration issue

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 Products
Vendor
langgenius
Product
dify
Versions
Affected
  • < 1.9.0
Problem Types
TypeCWE IDDescription
CWECWE-204CWE-204: Observable Response Discrepancy
Type: CWE
CWE ID: CWE-204
Description: CWE-204: Observable Response Discrepancy
Metrics
VersionBase scoreBase severityVector
4.05.5MEDIUM
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
Version: 4.0
Base score: 5.5
Base severity: MEDIUM
Vector:
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qx
x_refsource_CONFIRM
https://github.com/langgenius/dify/issues/24323
x_refsource_MISC
Hyperlink: https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qx
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/langgenius/dify/issues/24323
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:27 Feb, 2026 | 21:16
Updated At:27 Feb, 2026 | 21:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.05.5MEDIUM
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/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
Type: Secondary
Version: 4.0
Base score: 5.5
Base severity: MEDIUM
Vector:
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/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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-204Primarysecurity-advisories@github.com
CWE ID: CWE-204
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/langgenius/dify/issues/24323security-advisories@github.com
N/A
https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qxsecurity-advisories@github.com
N/A
Hyperlink: https://github.com/langgenius/dify/issues/24323
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qx
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

Similar CVEs

1Records found
CVE-2025-62512
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-5.5||MEDIUM
EPSS-0.05% / 14.72%
||
7 Day CHG~0.00%
Published-24 Feb, 2026 | 16:43
Updated-27 Feb, 2026 | 20:52
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Piwigo Vulnerable to User Enumeration via Password Reset Endpoint

Piwigo is an open source photo gallery application for the web. In version 15.5.0 and likely earlier 15.x releases, the password reset functionality in Piwigo allows an unauthenticated attacker to determine whether a given username or email address exists in the system. The endpoint at password.php?action=lost returns distinct messages for valid vs. invalid accounts, enabling user enumeration. As of time of publication, no known patches are available.

Action-Not Available
Vendor-Piwigo
Product-piwigoPiwigo
CWE ID-CWE-204
Observable Response Discrepancy
Details not found