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CVE-2026-82906— sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication

Quick assessment

Affected
sdcb chats
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在版本 1.12.0 及以下的 sdcb 聊天系统中发现一个漏洞。该漏洞影响组件“签名文件下载端点”中文件 中的 函数。该操控会导致缺失身份验证（认证）。此漏洞可被远程利用，但攻击复杂度被评为高，可利用性被描述为困难。相关漏洞已公开披露，且可能被利用。厂商虽在披露初期已收到通知，但未作出任何回应。

CVSS 3.7 · Low
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I. Basic Information for CVE-2026-82906

Vulnerability Information
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Vulnerability Title
sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in sdcb chats up to 1.12.0. This impacts the function DownloadPublic of the file src/BE/web/Controllers/Chats/Files/FileController.cs of the component Signed File Download Endpoint. This manipulation causes missing authentication. Remote exploitation of the attack is possible. The attack's complexity is rated as high. The exploitability is said to be difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
sdcb chats 1.0 cpe:2.3:a:sdcb:chats:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-82906

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III. Intelligence Information for CVE-2026-82906

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Other References for CVE-2026-82906 (1)

Other References for CVE-2026-82906 (4)

IV. Related Vulnerabilities

Same product: chats
Same vendor: sdcb
Same weakness: CWE-306

V. Comments for CVE-2026-82906

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