CVE-2026-123206

    Dashboard / Vulnerabilities / CVE-2026-123206

    CVE-2026-123206

    Published: 5 Nov 2026Last Modified: 7 Nov 2026

    Summary: EdgeChat before 2.20.3 Missing Authentication for Attachment Download via GET /files/:key

    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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123206.json, https://nvd.nist.gov/vuln/detail/CVE-2026-123206, https://www.vulncheck.com/advisories/edgechat-before-2.20.3-missing-authentication-for-attachment-download-via-get-files-key, https://github.com/aozorae/Edgechat/issues/58, https://github.com/aozorae/Edgechat/commit/38cb5cf42d8014ca64624d4f4d565419b2fbeda9, https://github.com/aozorae/Edgechat, https://github.com/aozorae/Edgechat/blob/1288c66997d5e2f9eefc515cf60b2072f8d655be/worker/src/data/uploaded-files.js#L146, https://hackmd.io/@hieund/edgechat-files-unauthenticated-public-attachment-disclosure

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -38cb5cf42d8014ca64624d4f4d565419b2fbeda9

    Affected versions

    v2.1.2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-123206 | CVE-DB