{"id":"CVE-2026-123206","published":"2026-11-05T19:17:20.043","lastModified":"2026-11-05T19:17:20.043","description":"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.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-306"],"vendors":[],"products":[],"references":[{"url":"https://github.com/aozorae/Edgechat/blob/1288c66997d5e2f9eefc515cf60b2072f8d655be/worker/src/data/uploaded-files.js#L146","tags":[]},{"url":"https://github.com/aozorae/Edgechat/commit/38cb5cf42d8014ca64624d4f4d565419b2fbeda9","tags":[]},{"url":"https://github.com/aozorae/Edgechat/issues/58","tags":[]},{"url":"https://hackmd.io/@hieund/edgechat-files-unauthenticated-public-attachment-disclosure","tags":[]},{"url":"https://www.vulncheck.com/advisories/edgechat-before-2.20.3-missing-authentication-for-attachment-download-via-get-files-key","tags":[]},{"url":"https://hackmd.io/@hieund/edgechat-files-unauthenticated-public-attachment-disclosure","tags":[]}],"exploitRefs":[{"url":"https://github.com/aozorae/Edgechat/blob/1288c66997d5e2f9eefc515cf60b2072f8d655be/worker/src/data/uploaded-files.js#L146","tags":[]},{"url":"https://github.com/aozorae/Edgechat/commit/38cb5cf42d8014ca64624d4f4d565419b2fbeda9","tags":[]},{"url":"https://github.com/aozorae/Edgechat/issues/58","tags":[]}],"hasPoc":true,"ai":null}