medium6.8
CVE-2026-90474
MCPHub before 1.0.32 contains an authentication bypass vulnerability in its embedded OAuth 2.0 authorization server where client authentication is disabled by …
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| MCPHub | before 1.0.32 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/samanhappy/mcphub/blob/v1.0.31/src/services/oauthServerService.ts#L26-L38
- https://github.com/samanhappy/mcphub/commit/e927620cd1a80e8691213b01eb8cd6ffa1a66e9f
- https://github.com/samanhappy/mcphub/releases/tag/v1.0.32
- https://github.com/samanhappy/mcphub/security/advisories/GHSA-3m7m-37xf-xp9x
- https://www.vulncheck.com/advisories/mcphub-before-1.0.32-oauth-2.0-authentication-bypass
- https://github.com/samanhappy/mcphub/security/advisories/GHSA-3m7m-37xf-xp9x