{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123206","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-05T17:58:51.927Z","datePublished":"2026-11-05T18:16:41.120Z","dateUpdated":"2026-11-05T19:03:57.588Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T18:16:41.120Z"},"datePublic":"2026-11-05T00:00:00.000Z","title":"EdgeChat before 2.20.3 Missing Authentication for Attachment Download via GET /files/:key","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Missing Authentication for Critical Function","cweId":"CWE-306","type":"CWE"}]}],"affected":[{"vendor":"aozorae","product":"EdgeChat","defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"2.20.3","status":"affected","versionType":"semver"}],"packageURL":"pkg:github/aozorae/edgechat","repo":"https://github.com/aozorae/Edgechat"}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW"}}],"references":[{"url":"https://github.com/aozorae/Edgechat/issues/58","tags":["issue-tracking"]},{"url":"https://github.com/aozorae/Edgechat/commit/38cb5cf42d8014ca64624d4f4d565419b2fbeda9","tags":["patch"]},{"url":"https://github.com/aozorae/Edgechat/blob/1288c66997d5e2f9eefc515cf60b2072f8d655be/worker/src/data/uploaded-files.js#L146","tags":["technical-description"]},{"url":"https://hackmd.io/@hieund/edgechat-files-unauthenticated-public-attachment-disclosure","tags":["technical-description"]},{"name":"VulnCheck Advisory: EdgeChat before 2.20.3 Missing Authentication for Attachment Download via GET /files/:key","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/edgechat-before-2.20.3-missing-authentication-for-attachment-download-via-get-files-key"}],"credits":[{"lang":"en","value":"hieuPenguinnn","type":"finder"},{"lang":"en","value":"aozorae","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"references":[{"url":"https://hackmd.io/@hieund/edgechat-files-unauthenticated-public-attachment-disclosure","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-05T19:03:28.410669Z","id":"CVE-2026-123206","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-05T19:03:57.588Z"}}]}}