Vulnerability · Published Feb 27, 2026 · Assigned by GitHub_M
CVE-2026-28288Dify has a user enumeration issue
Medium 5.5
In plain English
A medium-severity security flaw in dify from langgenius. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Severity (CVSS 4.0)5.5Medium
Exploit odds (30 days)0.7%top 47.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Nuclei
Official 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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| langgenius | dify | < 1.9.0 |
Weakness: CWE-204 · 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
References
- https://github.com/langgenius/dify/security/advisories/GHSA-9qpf-wcv3-w3qx x_refsource_CONFIRM
- https://github.com/langgenius/dify/issues/24323 x_refsource_MISC