Authorization Bypass Through User-Controlled Key in GitLab

{
  "id": "6dc9a65545bb1c03d8939b05619ac4c5285f5a2974ff8f4ce5d96255292421d0",
  "url": "https://osv.dev/vulnerability/CVE-2026-4868",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Authorization Bypass Through User-Controlled Key in GitLab",
    "summary": "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.",
    "evidence": "osv:CVE-2026-4868",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-4868",
      "aliases": [
        "BIT-gitlab-2026-4868",
        "CVE-2026-4868"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1010a9b2b769993080ce8399fd25e77c54e1ad1c"
                },
                {
                  "fixed": "0dafa5577c4a4eea262a393392b75b43f2ea80f1"
                },
                {
                  "introduced": "1060c7b0ff78be7c8abe8fd6d23dcb1ca493fd78"
                },
                {
                  "fixed": "78d6b913cb59e2ae115c4d7ddf4f065e654bbdd4"
                },
                {
                  "introduced": "f07e3c5b3c8128be5db112e5b2b618fe31ea1b35"
                },
                {
                  "last_affected": "f07e3c5b3c8128be5db112e5b2b618fe31ea1b35"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "18.8.0"
                      },
                      {
                        "fixed": "18.10.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "18.11.0"
                      },
                      {
                        "fixed": "18.11.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:19.0.0:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "19.0.0"
                      },
                      {
                        "last_affected": "19.0.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "19.0.0",
            "v19.0.0-ee",
            "v18.11.2-ee",
            "v18.11.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4868.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:19.221384227Z",
      "provider": "osv",
      "references": [
        "https://about.gitlab.com/releases/2026/05/27/patch-release-gitlab-19-0-1-released/",
        "https://gitlab.com/gitlab-org/gitlab/-/work_items/594809",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4868.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-4868",
        "https://hackerone.com/reports/3619872"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-639"
        ],
        "cna_assigner": "GitLab",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "18.8"
                  },
                  {
                    "fixed": "18.10.7"
                  },
                  {
                    "introduced": "18.11"
                  },
                  {
                    "fixed": "18.11.4"
                  },
                  {
                    "introduced": "19.0"
                  },
                  {
                    "fixed": "19.0.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "18.8"
                  },
                  {
                    "fixed": "18.10.7"
                  },
                  {
                    "introduced": "18.11"
                  },
                  {
                    "fixed": "18.11.4"
                  },
                  {
                    "introduced": "19.0"
                  },
                  {
                    "fixed": "19.0.1"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4868.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-4868",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 489195,
  "published_at": "2026-05-27T17:55:23.935+00:00"
}