Auth bypass in Aozorae Edgechat
CVE-2026-123206
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.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/aozorae/Edgechat/blob/1288c66997d5e2f9eefc515cf60b2072f8d655be/worke… (technical-description)
- github.com/aozorae/Edgechat/commit/38cb5cf42d8014ca64624d4f4d565419b2fbeda9 (patch)
- github.com/aozorae/Edgechat/issues/58 (issue-tracking)
- hackmd.io/@hieund/edgechat-files-unauthenticated-public-attachment-disclosure (technical-description)
- VulnCheck Advisory: EdgeChat before 2.20.3 Missing Authentication for Attachment Download via GET /files/:key (third-party-advisory)
Frequently asked questions
- What is CVE-2026-123206?
- CVE-2026-123206 is a low-severity vulnerability in Aozorae Edgechat, classified under Missing Authentication for Critical Function. CVSS score: 3.7/10. Published 2026-11-05.
- How severe is CVE-2026-123206?
- Low severity. CVSS v3 base score is 3.7 out of 10.