{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
              "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "18.2.0"
              },
              {
                "fixed": "18.8.9"
              },
              {
                "introduced": "18.9.0"
              },
              {
                "fixed": "18.9.5"
              },
              {
                "introduced": "18.10.0"
              },
              {
                "fixed": "18.10.3"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "64403a0daee4413eb45b939590f37c351b8e72bf"
            },
            {
              "fixed": "0e5855944a09654b84df0e4549c957a5d8c11c9d"
            },
            {
              "introduced": "20fe49b575fedd2b8cadc2c0640178879854aeb3"
            },
            {
              "fixed": "195c0c16799d8e10e8c16f129b0719f6c48b6110"
            },
            {
              "introduced": "57c08314af5bc8f317b1967330f92ed029e2c628"
            },
            {
              "fixed": "1dcd29ee5eb310bc7572339a95188e123e83970b"
            }
          ],
          "repo": "https://gitlab.com/gitlab-org/gitlab",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "GitLab",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4916.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "18.2"
          },
          {
            "fixed": "18.8.9"
          },
          {
            "introduced": "18.9"
          },
          {
            "fixed": "18.9.5"
          },
          {
            "introduced": "18.10"
          },
          {
            "fixed": "18.10.3"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "18.2"
          },
          {
            "fixed": "18.8.9"
          },
          {
            "introduced": "18.9"
          },
          {
            "fixed": "18.9.5"
          },
          {
            "introduced": "18.10"
          },
          {
            "fixed": "18.10.3"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user with custom role permissions to demote or remove higher-privileged group members due to improper authorization checks on member management operations.",
  "id": "CVE-2026-4916",
  "modified": "2026-08-27T11:30:28.135742162Z",
  "published": "2026-04-08T22:25:22.837Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/565414"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4916.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4916"
    },
    {
      "type": "REPORT",
      "url": "https://hackerone.com/reports/3301240"
    },
    {
      "type": "PACKAGE",
      "url": "git://git@gitlab.com:gitlab-org/gitlab.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Missing Authorization in GitLab"
}