Bug 2567474 (CVE-2026-123272)
| Summary: | CVE-2026-123272 github.com/mark3labs/mcp-go: mcp-go: Unauthorized access via improper OAuth metadata validation | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | mwringe |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in mcp-go. A malicious Model Context Protocol (MCP) server can declare arbitrary protected resources within its metadata due to improper validation in the OAuth metadata handler. This flaw allows an attacker to cause the authorization server to issue tokens scoped for unintended services, enabling unauthorized access when the attacker replays those tokens against the target resources.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
|
Description
OSIDB Bzimport
2026-11-05 22:00:48 UTC
|