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ghsa:GHSA-7XGJ-8392-5Q4R: fastmcp >= 3.0.0, < 3.4.10, >= 4.0.0, < 4.1.2; +1 more affected products
FastMCP: Post-transform component authorization is skipped on direct calls. Affected range: >= 3.0.0, < 3.4.10. Fixed version: 3.4.10. Affected range: >= 4.0.0, < 4.1.2. Fixed version: 4.1.2. Affected range: >= 3.0.0, < 3.4.10. Fixed version: 3.4.10. Affected range: >= 4.0.0, < 4.1.2. Fixed version: 4.1.2.
Affected technology
fastmcp · >= 3.0.0, < 3.4.10
Vendor not specified by the source
fastmcp · >= 4.0.0, < 4.1.2
Vendor not specified by the source
fastmcp-slim · >= 3.0.0, < 3.4.10
Vendor not specified by the source
fastmcp-slim · >= 4.0.0, < 4.1.2
Vendor not specified by the source
Component: Not specified by the source
Attack conditions (Source advisory, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required
What an attacker can do
Source advisory’s CVSS 3.1 assessment rates confidentiality and integrity impact as high; availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.
- Product
- fastmcp
- KEV
- no
Provenance
- GitHub Advisory Database · Source record · observed 2026-10-24 01:45:06.114611+00:00 UTC
Stable permalink: https://cybercodered.org/item/adv-ghsa-ghsa-7xgj-8392-5q4r.html