CVE-2026-82906sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 3.7 LOW (v3.1, CNA)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
- Weakness (CWE)
- CWE-306, CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
sdcb chats sdcb:chats | 1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; and 5 more ranges | CNA record |
References
- https://vuldb.com/vuln/397286vdb-entry, technical-description
- https://vuldb.com/vuln/397286/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-82906third-party-advisory
- https://vuldb.com/submit/877767third-party-advisory
- https://github.com/yaowenxiao721/Poc/blob/main/sdcb-chats/chats-poc-2.mdexploit
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.