{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.27.3"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "15b8a5805adf57c5189602008d38cccfd3c795e0"
            }
          ],
          "repo": "https://github.com/go-gitea/gitea",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-fqjr-23c8-gg9m"
  ],
  "database_specific": {
    "cna_assigner": "Gitea",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101027.json"
  },
  "details": "When `[migrations] ALLOWED_DOMAINS` was configured, a hostname matching the allow list was accepted without checking its resolved address against the local-network restrictions. A user who can start repository migrations and control the DNS of an allowed hostname could make it resolve to loopback or private addresses and bypass `ALLOW_LOCALNETWORKS = false`, reaching internal services from the Gitea server. Instances without `ALLOWED_DOMAINS` configured are not affected by this specific bypass.",
  "id": "CVE-2026-101027",
  "modified": "2026-10-08T02:30:34.604954086Z",
  "published": "2026-10-06T19:23:20.387Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://blog.gitea.com/release-of-28.0.0/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/101xxx/CVE-2026-101027.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/go-gitea/gitea/releases/tag/v28.0.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/go-gitea/gitea/security/advisories/GHSA-fqjr-23c8-gg9m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101027"
    },
    {
      "type": "FIX",
      "url": "https://github.com/go-gitea/gitea/pull/39426"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Gitea migration SSRF through ALLOWED_DOMAINS address check bypass"
}