Skip to content
Heist/ feed
Unrated

DEBIAN-CVE-2026-41159

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-41159

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-41159

node-mermaid

Source reference: /affected/0/package/name

Affected versions
8.11.0+ds+~cs29.13.22-1

Source reference: /affected/0/versions

8.13.2+ds+~cs30.13.21-1

Source reference: /affected/0/versions

8.13.2+ds+~cs30.13.21-1.1

Source reference: /affected/0/versions

8.13.3+ds+~cs26.13.21-1

Source reference: /affected/0/versions

8.13.3+ds+~cs26.13.21-2

Source reference: /affected/0/versions

8.13.8+~cs10.4.16-1

Source reference: /affected/0/versions

8.14.0+ds1+~cs11.4.14-1

Source reference: /affected/0/versions

8.14.0+~cs11.4.14-1

Source reference: /affected/0/versions

8.7.0+ds+~cs27.17.17-1

Source reference: /affected/0/versions

8.7.0+ds+~cs27.17.17-2

Source reference: /affected/0/versions

8.7.0+ds+~cs27.17.17-2~bpo10+1

Source reference: /affected/0/versions

8.7.0+ds+~cs27.17.17-3

Source reference: /affected/0/versions

8.9.1+ds+~cs26.20.25-1

Source reference: /affected/0/versions

8.9.3+ds+~cs29.13.19-1

Source reference: /affected/0/versions

9.2.2+~2.0.0-1

Source reference: /affected/0/versions

9.2.2+~2.0.0-2

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "node-mermaid",
      "purl": "pkg:deb/debian/node-mermaid?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "8.11.0+ds+~cs29.13.22-1",
      "8.13.2+ds+~cs30.13.21-1",
      "8.13.2+ds+~cs30.13.21-1.1",
      "8.13.3+ds+~cs26.13.21-1",
      "8.13.3+ds+~cs26.13.21-2",
      "8.13.8+~cs10.4.16-1",
      "8.14.0+ds1+~cs11.4.14-1",
      "8.14.0+~cs11.4.14-1",
      "8.7.0+ds+~cs27.17.17-1",
      "8.7.0+ds+~cs27.17.17-2",
      "8.7.0+ds+~cs27.17.17-2~bpo10+1",
      "8.7.0+ds+~cs27.17.17-3",
      "8.9.1+ds+~cs26.20.25-1",
      "8.9.3+ds+~cs29.13.19-1",
      "9.2.2+~2.0.0-1",
      "9.2.2+~2.0.0-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41159.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56906 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement