Bug 2567654 (CVE-2026-123206)

Summary: CVE-2026-123206 edgechat: EdgeChat: Information disclosure via missing authentication in file download endpoint
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in EdgeChat. A remote, unauthenticated attacker can exploit missing access controls in the file download route to download public-channel attachments without valid credentials or channel membership. By submitting a request with an attachment identifier and omitting or providing an invalid authentication token, the attacker can cause the application to disclose sensitive file contents.
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Description OSIDB Bzimport 2026-11-05 22:15:22 UTC 
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.