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CVE-2026-41149 Mermaid: Improper sanitization of `classDef` in state diagrams leads to HTML injection

🗓️ 22 May 2026 22:34:36Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 10 Views

Mermaid state diagrams HTML injection via classDef; fixed in 10.9.6 and 11.15.0; use sandbox mode.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-41149
22 May 202622:34
attackerkb
Chainguard
CVE-2026-41149 vulnerabilities
19 May 202601:17
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Circl
CVE-2026-41149
11 May 202617:37
circl
CNNVD
Mermaid 安全漏洞
22 May 202600:00
cnnvd
CVE
CVE-2026-41149
22 May 202622:34
cve
Debian CVE
CVE-2026-41149
22 May 202622:34
debiancve
EUVD
EUVD-2026-31520
22 May 202622:34
euvd
Github Security Blog
Mermaid: Improper sanitization of `classDef` in state diagrams leads to HTML injection
11 May 202619:36
github
NVD
CVE-2026-41149
22 May 202623:16
nvd
OSV
CGA-GRCV-9JQV-F3V4
18 May 202618:20
osv
Rows per page
[
  {
    "vendor": "mermaid-js",
    "product": "mermaid",
    "versions": [
      {
        "version": ">= 11.0.0-alpha.1, < 11.15.0",
        "status": "affected"
      },
      {
        "version": "< 10.9.6",
        "status": "affected"
      }
    ]
  }
]

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22 May 2026 22:34Current
CVSS 45.3
EPSS0.00521
10