Incorrect Authorization in GitLab

{
  "id": "4cf1b17dc087bd074366c50ba5867170179c7f9c41a125ac9e77fbac0b9a4f9e",
  "url": "https://osv.dev/vulnerability/CVE-2026-5377",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Incorrect Authorization in GitLab",
    "summary": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that could have allowed an authenticated user to access titles of confidential or private issues in public projects due to improper access control in the issue description rendering process.",
    "evidence": "osv:CVE-2026-5377",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-5377",
      "aliases": [
        "BIT-gitlab-2026-5377",
        "CVE-2026-5377"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1060c7b0ff78be7c8abe8fd6d23dcb1ca493fd78"
                },
                {
                  "last_affected": "1060c7b0ff78be7c8abe8fd6d23dcb1ca493fd78"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:18.11.0:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "18.11.0"
                      },
                      {
                        "last_affected": "18.11.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:18.11.0:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "18.11.0"
                      },
                      {
                        "last_affected": "18.11.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "18.11.0",
            "v18.11.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5377.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:48.005603271Z",
      "provider": "osv",
      "references": [
        "https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/",
        "https://gitlab.com/gitlab-org/gitlab/-/work_items/595553",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5377.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-5377",
        "https://hackerone.com/reports/3640688"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "GitLab",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "18.11"
                  },
                  {
                    "fixed": "18.11.1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "18.11"
                  },
                  {
                    "fixed": "18.11.1"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5377.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-5377",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487397,
  "published_at": "2026-04-22T16:04:31.304+00:00"
}