CVE-2026-123206

Low

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.

SeverityLow

CVSS3.7

Exploit probability—

ProductEdgeChat

PublishedNov 5, 2026

First seenNov 5, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

aozorae EdgeChat2.20.3 or later

Patches

github.com/aozorae/Edgechat/commit/38cb5cf42d8014ca64624d4f4d565419b2fbeda9

Affected products

Product	Affected versions	Fixed in
aozorae EdgeChat	v < 2.20.3	2.20.3

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