{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                "range": [
                  {
                    "introduced": "18.6.0"
                  },
                  {
                    "fixed": "19.1.8"
                  }
                ],
                "source": "CPE_RANGE"
              },
              {
                "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                "range": [
                  {
                    "introduced": "18.6.0"
                  },
                  {
                    "fixed": "19.1.8"
                  }
                ],
                "source": "CPE_RANGE"
              },
              {
                "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                "range": [
                  {
                    "introduced": "19.2.0"
                  },
                  {
                    "fixed": "19.2.6"
                  }
                ],
                "source": "CPE_RANGE"
              },
              {
                "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                "range": [
                  {
                    "introduced": "19.2.0"
                  },
                  {
                    "fixed": "19.2.6"
                  }
                ],
                "source": "CPE_RANGE"
              },
              {
                "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                "range": [
                  {
                    "introduced": "19.3.0"
                  },
                  {
                    "fixed": "19.3.2"
                  }
                ],
                "source": "CPE_RANGE"
              },
              {
                "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                "range": [
                  {
                    "introduced": "19.3.0"
                  },
                  {
                    "fixed": "19.3.2"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          "events": [
            {
              "introduced": "5927b4ad8ecf8b257f14761954d6e25858a3dc33"
            },
            {
              "fixed": "ec0fce03a55d83fb520d92d1428491e950dd51f4"
            },
            {
              "introduced": "68485a1eb627c9a992f266263157327649822db3"
            },
            {
              "fixed": "684d9581bfefb68c8593331266b69702589d80a3"
            },
            {
              "introduced": "8f83039bebbbb61d3b7b8b7e2342d1deec1e14c6"
            },
            {
              "fixed": "601afd607baae60e14e83e16fb9dea03cf8c7032"
            }
          ],
          "repo": "https://gitlab.com/gitlab-org/gitlab",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "GitLab",
    "cwe_ids": [
      "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12910.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "introduced": "18.6"
              },
              {
                "fixed": "19.1.8"
              },
              {
                "introduced": "19.2"
              },
              {
                "fixed": "19.2.6"
              },
              {
                "introduced": "19.3"
              },
              {
                "fixed": "19.3.2"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      },
      {
        "extracted_events": [
          {
            "range": [
              {
                "introduced": "18.6"
              },
              {
                "fixed": "19.1.8"
              },
              {
                "introduced": "19.2"
              },
              {
                "fixed": "19.2.6"
              },
              {
                "introduced": "19.3"
              },
              {
                "fixed": "19.3.2"
              }
            ],
            "source": "DESCRIPTION"
          }
        ]
      }
    ]
  },
  "details": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user to bypass SAML SSO sign-in restrictions and authenticate without SSO due to missing authentication enforcement checks.",
  "id": "CVE-2026-12910",
  "modified": "2026-10-30T10:30:25.744851313Z",
  "published": "2026-09-15T17:36:06.594Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/603742"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12910.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-12910"
    },
    {
      "type": "REPORT",
      "url": "https://hackerone.com/reports/3745561"
    },
    {
      "type": "PACKAGE",
      "url": "git://git@gitlab.com:gitlab-org/gitlab.git"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Missing Authentication for Critical Function in GitLab"
}