UBUNTU-CVE-2026-41159

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Source
https://ubuntu.com/security/CVE-2026-41159
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41159.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-41159
Upstream
  • CVE-2026-41159
Published
2026-06-01T00:00:00Z
Modified
2026-06-01T10:15:53.228228879Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Mermaid is a JavaScript tool that uses Markdown-inspired text to create and modify diagrams and charts. Prior to 10.9.6 and 11.15.0, Mermaid's default configuration allows injecting CSS that applies outside of the Mermaid diagram via the fontFamily, themeCSS, and altFontFamily configuration options. The injected CSS exploits stylis's & (scope reference) handling. :not(&) escapes the #mermaid-xxx automatic scoping, applying styles to all page elements. Global at-rules (@font-face, @keyframes, @counter-style) are also injectable as stylis hoists them to top level. This allows page defacement and DOM attribute exfiltration via CSS :has() selectors. This vulnerability is fixed in 10.9.6 and 11.15.0.

References

Affected packages

Ubuntu:22.04:LTS / node-mermaid

Package

Name
node-mermaid
Purl
pkg:deb/ubuntu/node-mermaid?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.7.0+ds+~cs27.17.17-3
8.13.3+ds+~cs26.13.21-1
8.13.3+ds+~cs26.13.21-2
8.13.8+~cs10.4.16-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "8.13.8+~cs10.4.16-1",
            "binary_name": "node-mermaid"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41159.json"