Gitea fork synchronization can expose private parent repository data

{
  "id": "2f0183e8e17c02ee40201eb6756f9e35afae46d2460ed1ff3f5109883d59bb97",
  "url": "https://osv.dev/vulnerability/CVE-2026-24451",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Gitea fork synchronization can expose private parent repository data",
    "summary": "Gitea 1.26.2 allows fork synchronization to continue after a parent repository changes from public to private, exposing data to a fork that should no longer be authorized.",
    "evidence": "osv:CVE-2026-24451",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-24451",
      "aliases": [
        "CVE-2026-24451",
        "GHSA-wrf9-r3h7-7x5v",
        "GO-2026-6081"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/go-gitea/gitea",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2c749ce548b1da0a52835861a87b888e67842d29"
                },
                {
                  "fixed": "4aa0d704f2c7d30351016b740bfc45247fd77efa"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.26.2"
                      },
                      {
                        "last_affected": "1.26.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4aa0d704f2c7d30351016b740bfc45247fd77efa"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.26.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.26.2",
            "v1.26.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-24451.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.054251084Z",
      "provider": "osv",
      "references": [
        "https://blog.gitea.com/release-of-1.26.3-and-1.26.4/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24451.json",
        "https://github.com/go-gitea/gitea/releases/tag/v1.26.3",
        "https://github.com/go-gitea/gitea/security/advisories/GHSA-wrf9-r3h7-7x5v",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-24451",
        "https://github.com/go-gitea/gitea/pull/38151"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-284"
        ],
        "cna_assigner": "Gitea",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/24xxx/CVE-2026-24451.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-24451",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499195,
  "published_at": "2026-07-03T20:19:31.362+00:00"
}