CVE-2026-5816 (GCVE-0-2026-5816)
Vulnerability from cvelistv5
Published
2026-04-22 16:04
Modified
2026-04-23 03:56
CWE
  • CWE-41 - Improper Resolution of Path Equivalence
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
Impacted products
Vendor Product Version
GitLab GitLab Version: 18.10   
Version: 18.11   
    cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website


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        "metrics": [
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              "content": {
                "id": "CVE-2026-5816",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
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                  {
                    "Technical Impact": "total"
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-22T00:00:00+00:00",
                "version": "2.0.3"
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        "providerMetadata": {
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          "repo": "git://git@gitlab.com:gitlab-org/gitlab.git",
          "vendor": "GitLab",
          "versions": [
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      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Thanks [joaxcar](https://hackerone.com/joaxcar) 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 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user\u0027s browser session due to improper path validation under certain conditions."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N",
            "version": "3.1"
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              "description": "CWE-41: Improper Resolution of Path Equivalence",
              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-04-22T16:04:26.293Z",
        "orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a",
        "shortName": "GitLab"
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      "references": [
        {
          "name": "HackerOne Bug Bounty Report #3572231",
          "tags": [
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            "permissions-required"
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          "url": "https://hackerone.com/reports/3572231"
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        {
          "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/592816"
        },
        {
          "url": "https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/"
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      "solutions": [
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          "lang": "en",
          "value": "Upgrade to versions 18.10.4, 18.11.1 or above."
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      "title": "Improper Resolution of Path Equivalence in GitLab"
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    "datePublished": "2026-04-22T16:04:26.293Z",
    "dateReserved": "2026-04-08T15:33:27.101Z",
    "dateUpdated": "2026-04-23T03:56:09.061Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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