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    CVE-2026-28288

    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.

    Published:Feb 27, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 27, 2026
    EPSS Score:0.00594
    CVSS Score:5.3

    Affected Products

    Vendor
    Dify
    Product
    Dify
    Vendor
    Langgenius
    Product
    Dify

    Exploits

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

    Common Weakness Enumeration

    CWE-204 Observable Response Discrepancy

    Related CVEs

    CVE-2026-41949 (CVSS 8.2) — Dify before version 1.14.2 contains an authorization bypass vulnerability in the file preview endpoint that al…
    CVE-2026-41948 (CVSS 9.3) — Dify version 1.14.1 and prior contain a path traversal vulnerability that allows authenticated users to manipu…
    CVE-2026-41947 (CVSS 9.3) — Dify before version 1.14.2 contains an authorization bypass vulnerability that allows authenticated editor use…
    CVE-2026-34082 (CVSS 5.3) — Dify is an open-source LLM app development platform. Prior to 1.13.1, the method `DELETE /console/api/installe…
    CVE-2026-21866 (CVSS 5.1) — Dify is an open-source LLM app development platform. Prior to 1.11.2, Dify is vulnerable to a stored XSS issue…
    CVE-2026-26023 (CVSS 5.3) — Dify is an open-source LLM app development platform. Prior to 1.13.0, a cross site scripting vulnerability has…
    CVE-2025-67732 (CVSS 8.4) — Dify is an open-source LLM app development platform. Prior to version 1.11.0, the API key is exposed in plaint…
    CVE-2025-63388 (CVSS 9.1) — A Cross-Origin Resource Sharing (CORS) misconfiguration vulnerability exists in Dify v1.9.1 in the /console/ap…
    CVE-2025-63386 (CVSS 9.1) — A Cross-Origin Resource Sharing (CORS) misconfiguration vulnerability exists in Dify v1.9.1 in the /console/ap…
    CVE-2025-56520 (CVSS 5.3) — Dify v1.6.0 was discovered to contain a Server-Side Request Forgery (SSRF) via the component controllers.conso…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High