CVE-2026-90474
MCPHub before 1.0.32 OAuth 2.0 Authentication Bypass
CVSS 4.0 7.6 HIGHCVSS 3.1 6.8 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-90474
PublishedMCPHub 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.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-90474 · CVE overview and exploitation status
cve-program · CVE-2026-90474
- https://github.com/samanhappy/mcphub/security/advisories/GHSA-3m7m-37xf-xp9x
- https://github.com/samanhappy/mcphub/commit/e927620cd1a80e8691213b01eb8cd6ffa1a66e9f
- https://github.com/samanhappy/mcphub/blob/v1.0.31/src/services/oauthServerService.ts#L26-L38
- https://github.com/samanhappy/mcphub/releases/tag/v1.0.32
- https://www.vulncheck.com/advisories/mcphub-before-1.0.32-oauth-2.0-authentication-bypass
Related changes
Linked by CVE identifierNo related changes are available here.