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CVE-2026-21866

Dify - Stored XSS in chat PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
langgenius / difyaffected < 1.11.2

CWE

CWE-79

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.