CVE-2026-90474: fallo de gravedad alta en samanhappy mcphub
MCPHub before 1.0.32 OAuth 2.0 Authentication Bypass
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.6epss 0.6%
MCPHub before 1.0.32 contains an authentication bypass vulnerability in its embedded OAuth 2.0 authorization server where client authentication is disabled by default and PKCE enforcement is optional. Attackers who obtain an authorization code through interception can redeem it for access tokens without providing a client secret or PKCE verifier, gaining access to victim accounts and their privileges.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Productos afectados
samanhappy · mcphubCVEs relacionadas — samanhappy mcphub
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-79748CRITICALMCPHub: Authenticated non-admin user achieves RCE via POST /api/servers (missing authorization on stdio command/args)EPSS 0.6%CVE-2026-79744HIGHMCPHub: Missing Authorization on `PUT /api/system-config` Lets Any Non-Admin Rewrite Global Security ConfigurationEPSS 0.6%CVE-2026-79743MEDIUMMCPHub: Path Traversal via Malicious MCPB Manifest NameEPSS 0.5%CVE-2026-79749HIGHMCPHub: SSRF Guard Bypass via IPv6 Transition Addresses in URL ValidationEPSS 0.4%CVE-2026-79745HIGHMCPHub: Missing Authorization on Built-in Prompt & Resource CRUD (Unauthorized Tampering of Globally-Served Templates/Resources)EPSS 0.4%CVE-2026-79750HIGHMCPHub authenticated horizontal IDOR: any non-admin user executes tools on other users' MCP servers (cross-tenant file read + SSRF)EPSS 0.4%
Referencias
https://github.com/samanhappy/mcphub/blob/v1.0.31/src/services/oauthServerService.ts#L26-L38https://github.com/samanhappy/mcphub/commit/e927620cd1a80e8691213b01eb8cd6ffa1a66e9fhttps://github.com/samanhappy/mcphub/releases/tag/v1.0.32https://github.com/samanhappy/mcphub/security/advisories/GHSA-3m7m-37xf-xp9xhttps://www.vulncheck.com/advisories/mcphub-before-1.0.32-oauth-2.0-authentication-bypass