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

• Mermaid: Improper sanitization of `classDefs` in diagrams leads to CSS injection - CVE-2026-41148
• Sanitize-html Vulnerable To REDoS Attacks - CVE-2022-25887
• Unsanitized JavaScript code injection possible in gatsby-plugin-mdx - CVE-2022-25863
• Raneto Denial of Service via crafted payload injected into `Search` parameter - CVE-2022-35142

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Tags:

npm

mermaid