Gitea 3D file viewer allows stored XSS through glTF extensionsRequired

{
  "id": "8b754ac13d80123c0f6b3fbf36620ac9af2455a6e5be3b053f02b98c3bf0d5b7",
  "url": "https://osv.dev/vulnerability/CVE-2026-28737",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Gitea 3D file viewer allows stored XSS through glTF extensionsRequired",
    "summary": "Gitea versions from 1.25.0 before 1.26.0 allow stored cross-site scripting through the extensionsRequired field in glTF files rendered by the 3D file viewer.",
    "evidence": "osv:CVE-2026-28737",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-28737",
      "aliases": [
        "CVE-2026-28737",
        "GHSA-9cpj-qc93-vw8v",
        "GO-2026-5286"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/go-gitea/gitea",
              "type": "GIT",
              "events": [
                {
                  "introduced": "44d7d2973afc942df120f081a138eddcd9f81511"
                },
                {
                  "fixed": "f09bea7af13bd00d07a34252468389d15de39a8d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.25.0"
                      },
                      {
                        "fixed": "1.26.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f09bea7af13bd00d07a34252468389d15de39a8d"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.26.0"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.25.0"
                      },
                      {
                        "fixed": "1.26.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.25.0-dev"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-28737.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.612548931Z",
      "provider": "osv",
      "references": [
        "https://blog.gitea.com/release-of-1.26.0/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28737.json",
        "https://github.com/go-gitea/gitea/releases/tag/v1.26.0",
        "https://github.com/go-gitea/gitea/security/advisories/GHSA-9cpj-qc93-vw8v",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-28737",
        "https://github.com/go-gitea/gitea/pull/37233"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "Gitea",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/28xxx/CVE-2026-28737.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-28737",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 502048,
  "published_at": "2026-07-03T20:19:39.358+00:00"
}