Medium
Dify has a user enumeration issue
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-28288
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 01:29 UTC · Revision 1
Source evidence
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.
osv:CVE-2026-28288
Complete source record
{
"id": "96a0dd09b9b60406fe84c0d3050a1605973520a28e00f94356e89587324fcbee",
"url": "https://osv.dev/vulnerability/CVE-2026-28288",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Dify has a user enumeration issue",
"summary": "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.",
"evidence": "osv:CVE-2026-28288",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-28288",
"aliases": [
"CVE-2026-28288",
"GHSA-9qpf-wcv3-w3qx"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/langgenius/dify",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "2e2c87c5a111c641255da029dcda17b0d4f1acbb"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "1.9.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:dify:dify:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.9.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
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"0.3.31-fix2",
"0.3.31-fix1",
"0.3.31",
"0.3.30",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28288.json"
}
}
],
"modified": "2026-10-28T02:30:48.562647590Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28288.json",
"https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qx",
"https://nvd.nist.gov/vuln/detail/CVE-2026-28288",
"https://github.com/langgenius/dify/issues/24323"
],
"provider_metadata": {
"cwe_ids": [
"CWE-204"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28288.json"
}
},
"related_cves": [
{
"value": "CVE-2026-28288",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 516992,
"published_at": "2026-02-27T20:25:24.599+00:00"
}