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| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-rww4-4w9c-7733 | FastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Fri, 03 Apr 2026 17:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 03 Apr 2026 16:30:00 +0000
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| Description | FastMCP is the standard framework for building MCP applications. Prior to version 3.2.0, while testing the GitHubProvider OAuth integration, which allows authentication to a FastMCP MCP server via a FastMCP OAuthProxy using GitHub OAuth, it was discovered that the FastMCP OAuthProxy does not properly validate the user's consent upon receiving the authorization code from GitHub. In combination with GitHub’s behavior of skipping the consent page for previously authorized clients, this introduces a Confused Deputy vulnerability. This issue has been patched in version 3.2.0. | |
| Title | FastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities | |
| Weaknesses | CWE-441 | |
| References |
| |
| Metrics |
cvssV4_0
|
Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-04-03T16:44:20.749Z
Reserved: 2026-02-17T18:42:27.043Z
Link: CVE-2026-27124
Updated: 2026-04-03T16:44:08.349Z
Status : Received
Published: 2026-04-03T16:16:36.453
Modified: 2026-04-03T17:16:41.970
Link: CVE-2026-27124
No data.
OpenCVE Enrichment
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Github GHSA