CVE-2026-108860 – BotSharp through 5.2.0 Authentication Bypass via Hard-Coded JWT Signing Key

​CVE ID :CVE-2026-108860

Published : Oct. 11, 2026, 2:17 p.m. | 4 hours, 6 minutes ago

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.

Severity: 9.3 | CRITICAL

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