CVE-2026-6335 (GCVE-0-2026-6335)
Vulnerability from cvelistv5
Published
2026-05-14 05:33
Modified
2026-05-15 09:58
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 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user to execute arbitrary code in another user's browser session due to improper sanitization.
References
Impacted products
Vendor Product Version
GitLab GitLab Version: 18.11   ≤
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
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                "id": "CVE-2026-6335",
                "options": [
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-15T03:55:48.991964Z",
                "version": "2.0.3"
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      "credits": [
        {
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          "type": "finder",
          "value": "Thanks [toofikz](https://hackerone.com/toofikz) for reporting this vulnerability through our HackerOne bug bounty program"
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          "lang": "en",
          "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user to execute arbitrary code in another user\u0027s browser session due to improper sanitization."
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      ],
      "metrics": [
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      "providerMetadata": {
        "dateUpdated": "2026-05-14T05:33:57.334Z",
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
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          "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/596760"
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          "name": "HackerOne Bug Bounty Report #3673647",
          "tags": [
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      "solutions": [
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          "value": "Upgrade to versions 18.11.3 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": "2026-04-15T09:04:47.248Z",
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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