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Sunday, 13 September 2026
8 agent hacks today▲ 7 vs yesterday (1)
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Incident database

MCPHub OAuth 2.0 authentication bypass vulnerability

MCPHub before version 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, allowing attackers to redeem intercepted authorization codes for access tokens without proper credentials.

Disclosed 12 September 2026 · Record updated 13 September 2026

Impact

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.

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-90474