CVE-2026-50159

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.8 and 11.16.1, Mermaid is vulnerable to CSS injection via sibling combinator selectors generated from diagram-supplied class or id names. An attacker who can supply diagram text can inject arbitrary CSS into the rendered page, potentially altering the appearance or behavior of unrelated page elements. This issue is fixed in versions 10.9.8 and 11.16.1.

CVSS

No CVSS.

References

Link	Resource
https://github.com/mermaid-js/mermaid/commit/12d472c9ed43f94814b110da8d7a9ae6dd5266ed
https://github.com/mermaid-js/mermaid/commit/7e83f1533318b307764d961906a73377266f4c5e
https://github.com/mermaid-js/mermaid/pull/8022
https://github.com/mermaid-js/mermaid/releases/tag/mermaid@11.16.1
https://github.com/mermaid-js/mermaid/releases/tag/v10.9.8
https://github.com/mermaid-js/mermaid/security/advisories/GHSA-6x64-9x62-f2gx

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-06 22:17

Updated : 2026-09-08 20:53

NVD link : CVE-2026-50159

Mitre link : CVE-2026-50159

CVE.ORG link : CVE-2026-50159

JSON object : View

Products Affected

No product.

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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