Authorization Bypass Through User-Controlled Key in GitLab_CVE-2026-4868

8.2 / 10

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that, under certain conditions, could have allowed an authenticated user to cause specific Duo AI workflows to run under another user's identity due to improper user identity resolution when triggering Duo AI workflow runners.

Basic Information

ID CVE-2026-4868

Source GitLab

Published May 27, 2026 at 17:55

Affected Product

Vendor GitLab

Product GitLab

Version 18.8

Affected Versions GitLab GitLab 18.8
GitLab GitLab 18.11
GitLab GitLab 19.0

CWE Classification

CWE-639

References

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    "lastseen": "",
    "description": "GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that, under certain conditions, could have allowed an authenticated user to cause specific Duo AI workflows to run under another user's identity due to improper user identity resolution when triggering Duo AI workflow runners.",
    "published": "2026-05-27T17:55:23.935Z",
    "modified": "2026-05-27T17:55:23.935Z",
    "type": "cve",
    "title": "Authorization Bypass Through User-Controlled Key in GitLab",
    "source": "GitLab",
    "references": "https://gitlab.com/gitlab-org/gitlab/-/work_items/594809\nhttps://hackerone.com/reports/3619872\nhttps://about.gitlab.com/releases/2026/05/27/patch-release-gitlab-19-0-1-released/",
    "id": "CVE-2026-4868",
    "bulletinFamily": "",
    "cwe": [
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    "cvelist": null,
    "sourceData": "GitLab GitLab 18.8\nGitLab GitLab 18.11\nGitLab GitLab 19.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "GitLab",
    "version": "18.8",
    "vendor": "GitLab",
    "ai_description": "",
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    "ai_score": 0
}