Dify is an open-source LLM app development platform. Prior to 1.11.2, Dify is vulnerable to a stored XSS issue when rendering Mermaid diagrams within chats. This occurs because Dify’s default Mermaid configuration uses securityLevel: loose, which allows potentially unsafe content to execute. This vulnerability is fixed in 1.11.2.
History

Wed, 04 Mar 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 04 Mar 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Langgenius
Langgenius dify
Vendors & Products Langgenius
Langgenius dify

Tue, 03 Mar 2026 22:00:00 +0000

Type Values Removed Values Added
Description Dify is an open-source LLM app development platform. Prior to 1.11.2, Dify is vulnerable to a stored XSS issue when rendering Mermaid diagrams within chats. This occurs because Dify’s default Mermaid configuration uses securityLevel: loose, which allows potentially unsafe content to execute. This vulnerability is fixed in 1.11.2.
Title Dify - Stored XSS in chat
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-03T21:42:25.311Z

Updated: 2026-03-04T21:18:08.260Z

Reserved: 2026-01-05T16:44:16.368Z

Link: CVE-2026-21866

cve-icon Vulnrichment

Updated: 2026-03-04T21:18:03.261Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-03T22:16:27.973

Modified: 2026-03-04T18:08:05.730

Link: CVE-2026-21866

cve-icon Redhat

No data.