Bug 2567523 (CVE-2026-123271)
| Summary: | CVE-2026-123271 github.com/diillson/chatcli: ChatCLI: Unauthorized access via unvalidated MCP OAuth resource indicator | ||
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| 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 | Keywords: | Security |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in ChatCLI. During the Model Context Protocol (MCP) Open Authorization (OAuth) login process, the application does not verify whether server-supplied resource metadata matches the configured server URL. A malicious MCP server can exploit this issue by specifying a different resource hosted on the same authorization server, allowing it to capture the user's bearer authentication token and replay it to gain unauthorized access to that secondary resource.
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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: | |||
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Description
OSIDB Bzimport
2026-11-05 22:04:40 UTC
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