{"id":"CVE-2026-108860","revision":"9a8e94d724214004bc2c7d5aa79bbae0","records":[{"revision":"9a8e94d724214004bc2c7d5aa79bbae0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-108860","aliases":[],"title":"BotSharp through 5.2.0 Authentication Bypass via Hard-Coded JWT Signing Key","description":"BotSharp through 5.2.0 contains an authentication bypass vulnerability that allows unauthenticated remote attackers to forge bearer tokens using the hard-coded Jwt:Key in WebStarter appsettings.json. Attackers can sign tokens with the committed HMAC secret and fixed botsharp issuer and audience to impersonate any known user, including administrators, on Authorize-protected API routes.","state":0,"publishedAt":"2026-10-11T13:26:07.369+00:00","modifiedAt":"2026-10-14T16:47:26.986+00:00","affected":[{"ecosystem":"Vendor product","name":"BotSharp","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"SciSharp\",\n                    \"product\": \"BotSharp\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"lessThanOrEqual\": \"5.2.0\",\n                            \"versionType\": \"custom\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/SciSharp/BotSharp\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/scisharp-botsharp-public-jwt-signing-key","https://github.com/SciSharp/BotSharp/blob/a11ee0317cab5c619df1cb5d0c4fc39d1b6e30b4/src/WebStarter/appsettings.json#L16-L20","https://github.com/SciSharp/BotSharp/blob/a11ee0317cab5c619df1cb5d0c4fc39d1b6e30b4/src/Infrastructure/BotSharp.OpenAPI/BotSharpOpenApiExtensions.cs#L46-L57","https://github.com/SciSharp/BotSharp","https://www.vulncheck.com/advisories/botsharp-through-5.2.0-authentication-bypass-via-hard-coded-jwt-signing-key"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-108860","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-108860","identifiers":["CVE-2026-108860"]},"retained":false,"historicalAffected":[]}],"coverage":[]}