CVE-2026-90474
MCPHub before 1.0.32 contains an authentication bypass vulnerability in its embedded OAuth 2.0 authorization server where client authenticat
CVSS
6.8
Medium
EPSS
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KEV
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Exploit Today
0
0-100
Published: Sep 12, 2026 · Last modified: Sep 12, 2026 · CWE-287
Not enough EPSS history yet.
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.
- github.comhttps://github.com/samanhappy/mcphub/blob/v1.0.31/src/services/oauthServerService.ts#L26-L38
- github.comhttps://github.com/samanhappy/mcphub/commit/e927620cd1a80e8691213b01eb8cd6ffa1a66e9f
- github.comhttps://github.com/samanhappy/mcphub/releases/tag/v1.0.32
- github.comhttps://github.com/samanhappy/mcphub/security/advisories/GHSA-3m7m-37xf-xp9x
- www.vulncheck.comhttps://www.vulncheck.com/advisories/mcphub-before-1.0.32-oauth-2.0-authentication-bypass
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-758009.8 CRI—
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