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CVE-2026-77243

MCP Atlassian: ENABLED_TOOLS / Toolset authorization bypass PUBLISHED

Description (CNA)

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, ENABLED_TOOLS and TOOLSETS are applied when tools are listed but are not rechecked when a tools/call request is dispatched. A client that knows a hidden tool name can directly invoke excluded read, write, or delete tools despite the operator's configured least-privilege restrictions. The advisory traces the vulnerable input and processing flow through ENABLED_TOOLS, TOOLSETS, tools/list, tools/call, and _call_tool_mcp, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

Affected (CNA)

Vendor / productVersions
sooperset / mcp-atlassianaffected < 0.22.0

CWE

CWE-862

References

ADP enrichment

CISA-ADP

No English description supplied.