FKIE_CVE-2026-2973

Vulnerability from fkie_nvd - Published: 2026-03-25 17:16 - Updated: 2026-03-26 17:43
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user's browser due to improper sanitization of entity-encoded content in Mermaid diagrams.
References
cve@gitlab.comhttps://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/Release Notes, Vendor Advisory
cve@gitlab.comhttps://gitlab.com/gitlab-org/gitlab/-/work_items/591049Broken Link
cve@gitlab.comhttps://hackerone.com/reports/3566802Permissions Required
Impacted products
Vendor Product Version
gitlab gitlab *
gitlab gitlab *
gitlab gitlab *
gitlab gitlab *
gitlab gitlab 18.10.0
gitlab gitlab 18.10.0
To clipboard 

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  "cveTags": [],
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      "lang": "en",
      "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user\u0027s browser due to improper sanitization of entity-encoded content in Mermaid diagrams."
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      "value": "GitLab ha remediado un problema en GitLab CE/EE que afecta a todas las versiones desde la 17.7 y anteriores a la 18.8.7, la 18.9 y anteriores a la 18.9.3, y la 18.10 y anteriores a la 18.10.1 que podr\u00eda haber permitido a un usuario autenticado ejecutar JavaScript arbitrario en el navegador de un usuario debido a una sanitizaci\u00f3n incorrecta del contenido codificado por entidades en los diagramas de Mermaid."
    }
  ],
  "id": "CVE-2026-2973",
  "lastModified": "2026-03-26T17:43:28.610",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
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        "impactScore": 2.7,
        "source": "cve@gitlab.com",
        "type": "Secondary"
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  "published": "2026-03-25T17:16:58.183",
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          "value": "CWE-79"
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      "source": "cve@gitlab.com",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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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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