ByteOS Network

NVD Vulnerability Details :

CVE-2026-21866

Received

Source-security-advisories@github.com

Published At-03 Mar, 2026 | 22:16

Updated At-03 Mar, 2026 | 22:16

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.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	5.1	MEDIUM	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Type: Secondary

Version: 4.0

Base score: 5.1

Base severity: MEDIUM

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE ID	Type	Source
CWE-79	Primary	security-advisories@github.com

CWE ID: CWE-79

Type: Primary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/langgenius/dify/commit/ae17537470bba417a8971fff705dd82ecb043564	security-advisories@github.com	N/A
https://github.com/langgenius/dify/pull/29811	security-advisories@github.com	N/A
https://github.com/langgenius/dify/security/advisories/GHSA-qpv6-75c2-75h4	security-advisories@github.com	N/A