CVE-2026-2973 (GCVE-0-2026-2973)
Vulnerability from cvelistv5
Published
2026-03-25 16:34
Modified
2026-03-26 17:24
Severity ?
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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
Impacted products
Vendor Product Version
GitLab GitLab Version: 17.7   ≤
Version: 18.9   ≤
Version: 18.10   ≤
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
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                "id": "CVE-2026-2973",
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-03-26T17:24:23.575803Z",
                "version": "2.0.3"
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          "type": "finder",
          "value": "Thanks [go7f0](https://hackerone.com/go7f0) for reporting this vulnerability through our HackerOne bug bounty program"
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        }
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            "privilegesRequired": "LOW",
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              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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      "providerMetadata": {
        "dateUpdated": "2026-03-25T16:34:03.852Z",
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
        "shortName": "GitLab"
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      "references": [
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          "name": "HackerOne Bug Bounty Report #3566802",
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          "url": "https://hackerone.com/reports/3566802"
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          "url": "https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/"
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      "solutions": [
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          "lang": "en",
          "value": "Upgrade to versions 18.8.7, 18.9.3, 18.10.1 or above."
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      "title": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027) in GitLab"
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    "dateReserved": "2026-02-22T11:04:12.829Z",
    "dateUpdated": "2026-03-26T17:24:32.440Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2"
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