CVE-2026-123206 (GCVE-0-2026-123206)
Vulnerability from cvelistv5 – Published: 2026-11-05 18:16 – Updated: 2026-11-05 19:03
VLAI
EPSS
VEX
Title
EdgeChat before 2.20.3 Missing Authentication for Attachment Download via GET /files/:key
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 19:03 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
VulnCheck
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/aozorae/Edgechat/issues/58 | issue-tracking |
| https://github.com/aozorae/Edgechat/commit/38cb5c… | patch |
| https://github.com/aozorae/Edgechat/blob/1288c669… | technical-description |
| https://hackmd.io/@hieund/edgechat-files-unauthen… | technical-description |
| https://www.vulncheck.com/advisories/edgechat-bef… | third-party-advisory |
Date Public
2026-11-05 00:00
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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