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CVE-2026-50159

Published Aug 6, 2026 CWE-94 EPSS 0.61% (47th pctl)

Overview

CVE-2026-50159 is a known-severity vulnerability. It was published on August 6, 2026.

Technical Description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHub github.com/mermaid-js/mermaid/commit/12d472c9ed43f94814b110da8d7a9ae6dd5266ed GitHub github.com/mermaid-js/mermaid/commit/7e83f1533318b307764d961906a73377266f4c5e GitHub github.com/mermaid-js/mermaid/pull/8022 GitHub github.com/mermaid-js/mermaid/releases/tag/[email protected] GitHub github.com/mermaid-js/mermaid/releases/tag/v10.9.8 GitHub github.com/mermaid-js/mermaid/security/advisories/GHSA-6x64-9x62-f2gx

Frequently Asked Questions

What is CVE-2026-50159?

CVE-2026-50159 is a known-severity vulnerability. It was published on August 6, 2026.

How severe is CVE-2026-50159?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-50159?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-50159?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-50159 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

Autonomous Discovery

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Continuous Pentesting

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Code Review

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.
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