Authorization Bypass Through User-Controlled Key in GitLab_CVE-2026-6976

3.7 / 10

LOW

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

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to hide changes from merge request diff views due to improper input handling of file names.

Basic Information

ID CVE-2026-6976

Source GitLab

Published Jun 11, 2026 at 10:20

Modified Jun 11, 2026 at 12:33

Affected Product

Vendor GitLab

Product GitLab

Version 15.9

Affected Versions GitLab GitLab 15.9
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 CE/EE affecting all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to hide changes from merge request diff views due to improper input handling of file names.",
    "published": "2026-06-11T10:20:11.436Z",
    "modified": "2026-06-11T12:33:23.414Z",
    "type": "cve",
    "title": "Authorization Bypass Through User-Controlled Key in GitLab",
    "source": "GitLab",
    "references": "https://gitlab.com/gitlab-org/gitlab/-/work_items/598165\nhttps://hackerone.com/reports/3638136\nhttps://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/",
    "id": "CVE-2026-6976",
    "bulletinFamily": "",
    "cwe": [
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    "cvelist": null,
    "sourceData": "GitLab GitLab 15.9\nGitLab GitLab 18.11\nGitLab GitLab 19.0",
    "sourceHref": "",
    "cvss": {
        "score": 3.7,
        "severity": "LOW",
        "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseSeverity": "",
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    "href": "",
    "category_name": "CVE",
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    "product": "GitLab",
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    "ai_description": "",
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