🛡️ CVE-2026-41149
⚪ Unknown ✅ No Known Exploit CWE-94 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Versions 10.9.5 and earlier, as well as 11.0.0-alpha.1 through 11.14.0, are vulnerable to HTML injection under the default configuration. Specifically, the classDef directive in Mermaid state diagrams permits DOM injection that escapes the SVG context. However, tags are stripped, which prevents cross-site scripting (XSS). This issue has been fixed in versions 10.9.6 and 11.15.0. If developers are unable to immediately upgrade, they can work around this issue by setting "securityLevel": "sandbox", which prevents the issue by rendering the mermaid diagram in a sandboxed .

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L
CWE CWE-94
Public Exploit ✅ No
Source NVD
Published 2026-05-11
Updated 2026-06-09
Modified 2026-06-08
Fix URL N/A

Affected Packages

Software From version Fixed in
mermaid — —
unknown — —

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