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.
Metrics
Affected Vendors & Products
References
History
Tue, 15 Sep 2026 17:30:00 +0000
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ssvc
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Sun, 13 Sep 2026 08:30:00 +0000
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Samanhappy
Samanhappy mcphub |
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Samanhappy
Samanhappy mcphub |
Sat, 12 Sep 2026 11:15:00 +0000
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| Description | 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. | |
| Title | MCPHub before 1.0.32 OAuth 2.0 Authentication Bypass | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-09-12T11:06:12.925Z
Updated: 2026-09-24T14:21:45.208Z
Reserved: 2026-09-12T02:03:32.649Z
Link: CVE-2026-90474
Updated: 2026-09-15T16:58:37.842Z
Status : Deferred
Published: 2026-09-12T11:16:34.483
Modified: 2026-09-23T17:17:47.390
Link: CVE-2026-90474
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