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.
Published: 2026-08-31
Score: 6.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A flaw in the DownloadPublic endpoint of sdcb Chats allows any user to retrieve files without authentication, resulting in an authentication failure and missing authentication weakness. The vulnerability permits remote attackers to access confidential documents and may compromise confidentiality, integrity, or availability if the files contain sensitive data. The flaw is categorized as CWE‑287 and CWE‑306.

Affected Systems

sdcb Chats versions up to and including 1.12.0 are affected; all earlier releases remain vulnerable unless a patch is applied.

Risk and Exploitability

The CVSS score of 6.3 indicates moderate severity, and while the EPSS score is not available, the issue is not listed in CISA KEV. The vendor has not released a fix, and the vulnerability has been published, so the risk of exploitation remains significant. The attack vector is likely a public HTTP request to the DownloadPublic endpoint, and though the complexity is rated high and exploitability difficult, the possibility of remote exploitation persists.

Generated by OpenCVE AI on August 31, 2026 at 21:45 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade sdcb Chats to the latest release that includes the authentication fix for the DownloadPublic endpoint.
  • If no patch is available, disable or lock down the public DownloadPublic endpoint, adding an authentication requirement or removing it from public access.
  • Apply network firewall rules to restrict the IP range that can reach the endpoint, limiting exposure to trusted hosts.
  • Monitor application logs for unusual download attempts and configure alerts for suspicious activity.

Generated by OpenCVE AI on August 31, 2026 at 21:45 UTC.

Tracking

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Advisories

No advisories yet.

History

Mon, 31 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
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.
Title sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication
First Time appeared Sdcb
Sdcb chats
Weaknesses CWE-287
CWE-306
CPEs cpe:2.3:a:sdcb:chats:*:*:*:*:*:*:*:*
Vendors & Products Sdcb
Sdcb chats
References
Metrics cvssV2_0

{'score': 2.6, 'vector': 'AV:N/AC:H/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 3.7, 'vector': 'CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P'}

Subscriptions

Sdcb Chats
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-08-31T20:00:10.019Z

Reserved: 2026-08-31T09:46:30.626Z

Link: CVE-2026-82906

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-31T21:17:54.330

Modified: 2026-08-31T21:17:54.330

Link: CVE-2026-82906

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T22:00:06Z

Weaknesses
  • CWE-287

    Improper Authentication

  • CWE-306

    Missing Authentication for Critical Function