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CVE-2026-50159

Mermaid allows CSS injection applying to sibling elements of the diagram PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
mermaid-js / mermaidaffected < 10.9.8; affected >= 11.0.0-alpha.1, < 11.16.1

CWE

CWE-94

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.