Possible inject arbitrary `CSS` into the generated graph affecting the container HTML

Description

An attacker is able to inject arbitrary CSS into the generated graph allowing them to change the styling of elements outside of the generated graph, and potentially exfiltrate sensitive information by using specially crafted CSS selectors.

Recommendation

Update the mermaid package to the latest compatible version. Followings are version details:

• Affected version(s): >= 8.0.0, < 9.1.2
• Patched version(s): 9.1.2

References

• GHSA-x3vm-38hw-55wf
• CVE-2022-31108
• CWE-74
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• Clipboard feature vulnerability allowing to inject arbitrary HTML into the editor using paste functionality - CVE-2021-32809
• Unsanitized JavaScript code injection possible in gatsby-plugin-mdx - CVE-2022-25863
• Mermaid allows CSS injection applying to sibling elements of the diagram - CVE-2026-50159
• Improper handling of CSS at-rules in lettersanitizer - CVE-2022-31103

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Tags:

npm

mermaid