{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "38cb5cf42d8014ca64624d4f4d565419b2fbeda9"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "38cb5cf42d8014ca64624d4f4d565419b2fbeda9"
            }
          ],
          "repo": "https://github.com/aozorae/edgechat",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123206.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "fixed": "2.20.3"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      },
      {
        "extracted_events": [
          {
            "range": [
              {
                "fixed": "2.20.3"
              }
            ],
            "source": "DESCRIPTION"
          }
        ]
      }
    ]
  },
  "details": "EdgeChat before 2.20.3 contains a missing authentication vulnerability in the GET /files/:key route that allows unauthenticated or banned users to download decrypted public-channel attachments because canAccessFile() accepts a null user id. Attackers holding an attachment object key can omit or supply an invalid token to retrieve plaintext attachments without a session or channel membership.",
  "id": "CVE-2026-123206",
  "modified": "2026-11-05T21:15:40.932403093Z",
  "published": "2026-11-05T18:16:41.120Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123206.json"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/aozorae/Edgechat"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/aozorae/Edgechat/blob/1288c66997d5e2f9eefc515cf60b2072f8d655be/worker/src/data/uploaded-files.js#L146"
    },
    {
      "type": "FIX",
      "url": "https://github.com/aozorae/Edgechat/commit/38cb5cf42d8014ca64624d4f4d565419b2fbeda9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/aozorae/Edgechat/issues/58"
    },
    {
      "type": "ARTICLE",
      "url": "https://hackmd.io/@hieund/edgechat-files-unauthenticated-public-attachment-disclosure"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123206"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/edgechat-before-2.20.3-missing-authentication-for-attachment-download-via-get-files-key"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "EdgeChat before 2.20.3 Missing Authentication for Attachment Download via GET /files/:key"
}