{"id":"CVE-2026-82906","state":"PUBLISHED","title":"sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication","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.","publishedAt":"2026-08-31T20:00:10.019Z","updatedAt":"2026-09-01T16:07:20.589Z","severity":{"score":6.3,"label":"Medium","version":"4.0","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","source":"VulDB"},"assigner":"VulDB","products":["sdcb chats"],"affected":[{"vendor":"sdcb","product":"chats","versions":[{"version":"1.0","status":"affected"},{"version":"1.1","status":"affected"},{"version":"1.2","status":"affected"},{"version":"1.3","status":"affected"},{"version":"1.4","status":"affected"},{"version":"1.5","status":"affected"},{"version":"1.6","status":"affected"},{"version":"1.7","status":"affected"},{"version":"1.8","status":"affected"},{"version":"1.9","status":"affected"},{"version":"1.10","status":"affected"},{"version":"1.11","status":"affected"},{"version":"1.12.0","status":"affected"}],"cpes":["cpe:2.3:a:sdcb:chats:*:*:*:*:*:*:*:*"],"modules":["Signed File Download Endpoint"]}],"references":["https://vuldb.com/vuln/397286","https://vuldb.com/vuln/397286/cti","https://vuldb.com/cve/CVE-2026-82906","https://vuldb.com/submit/877767","https://github.com/yaowenxiao721/Poc/blob/main/sdcb-chats/chats-poc-2.md"],"weaknesses":["CWE-306","CWE-287"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82906.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82906","state":"PUBLISHED","datePublished":"2026-08-31T20:00:10.019Z","dateUpdated":"2026-09-01T16:07:20.589Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-08-31T09:46:30.626Z"},"containers":{"cna":{"title":"sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"sdcb","product":"chats","versions":[{"version":"1.0","status":"affected"},{"version":"1.1","status":"affected"},{"version":"1.2","status":"affected"},{"version":"1.3","status":"affected"},{"version":"1.4","status":"affected"},{"version":"1.5","status":"affected"},{"version":"1.6","status":"affected"},{"version":"1.7","status":"affected"},{"version":"1.8","status":"affected"},{"version":"1.9","status":"affected"},{"version":"1.10","status":"affected"},{"version":"1.11","status":"affected"},{"version":"1.12.0","status":"affected"}],"cpes":["cpe:2.3:a:sdcb:chats:*:*:*:*:*:*:*:*"],"modules":["Signed File Download Endpoint"]}],"references":[{"url":"https://vuldb.com/vuln/397286","name":"VDB-397286 | sdcb chats Signed File Download Endpoint FileController.cs DownloadPublic missing authentication","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/397286/cti","name":"VDB-397286 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-82906","name":"CVE-2026-82906 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/877767","name":"Submit #877767 | sdcb chats 1.12.0 Missing Authorization","tags":["third-party-advisory"]},{"url":"https://github.com/yaowenxiao721/Poc/blob/main/sdcb-chats/chats-poc-2.md","tags":["exploit"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":6.3,"vectorString":"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","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":3.7,"vectorString":"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","baseSeverity":"LOW"}},{"cvssV3_0":{"version":"3.0","baseScore":3.7,"vectorString":"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","baseSeverity":"LOW"}},{"cvssV2_0":{"version":"2.0","baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","type":"CWE","lang":"en","description":"Missing Authentication"}]},{"descriptions":[{"cweId":"CWE-287","type":"CWE","lang":"en","description":"Improper Authentication"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-08-31T20:00:10.019Z"},"timeline":[{"time":"2026-08-31T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-08-31T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-08-31T11:51:43.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"yaowenxiao (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}],"x_generator":["VulDB PVTS v202608"]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-01T16:07:13.207073Z","id":"CVE-2026-82906","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-01T16:07:20.589Z"}}]}}}