FKIE_CVE-2026-32308

Vulnerability from fkie_nvd - Published: 2026-03-13 19:54 - Updated: 2026-03-17 20:08
Severity ?
7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Summary
OneUptime is a solution for monitoring and managing online services. Prior to 10.0.23, the Markdown viewer component renders Mermaid diagrams with securityLevel: "loose" and injects the SVG output via innerHTML. This configuration explicitly allows interactive event bindings in Mermaid diagrams, enabling XSS through Mermaid's click directive which can execute arbitrary JavaScript. Any field that renders markdown (incident descriptions, status page announcements, monitor notes) is vulnerable. This vulnerability is fixed in 10.0.23.
References
security-advisories@github.comhttps://github.com/OneUptime/oneuptime/security/advisories/GHSA-wvh5-6vjm-23qhExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
hackerbay oneuptime *
To clipboard 

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              "versionEndExcluding": "10.0.23",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OneUptime is a solution for monitoring and managing online services. Prior to 10.0.23, the Markdown viewer component renders Mermaid diagrams with securityLevel: \"loose\" and injects the SVG output via innerHTML. This configuration explicitly allows interactive event bindings in Mermaid diagrams, enabling XSS through Mermaid\u0027s click directive which can execute arbitrary JavaScript. Any field that renders markdown (incident descriptions, status page announcements, monitor notes) is vulnerable. This vulnerability is fixed in 10.0.23."
    },
    {
      "lang": "es",
      "value": "OneUptime es una soluci\u00f3n para monitorear y gestionar servicios en l\u00ednea. Antes de la versi\u00f3n 10.0.23, el componente visor de Markdown renderiza diagramas Mermaid con securityLevel: \u0027loose\u0027 e inyecta la salida SVG a trav\u00e9s de innerHTML. Esta configuraci\u00f3n permite expl\u00edcitamente enlaces de eventos interactivos en los diagramas Mermaid, lo que habilita XSS a trav\u00e9s de la directiva \u0027click\u0027 de Mermaid que puede ejecutar JavaScript arbitrario. Cualquier campo que renderice markdown (descripciones de incidentes, anuncios de p\u00e1ginas de estado, notas de monitores) es vulnerable. Esta vulnerabilidad se corrige en la versi\u00f3n 10.0.23."
    }
  ],
  "id": "CVE-2026-32308",
  "lastModified": "2026-03-17T20:08:07.103",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N",
          "version": "3.1"
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        "impactScore": 4.7,
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  "references": [
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      "tags": [
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        "Mitigation",
        "Vendor Advisory"
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      "url": "https://github.com/OneUptime/oneuptime/security/advisories/GHSA-wvh5-6vjm-23qh"
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
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      "description": [
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          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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