CVE-2026-77243
highMCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira).
Vendor / product: Mcp-atlassian — mcp atlassian
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 security-advisories@github.com
- https://github.com/sooperset/mcp-atlassian/pull/1448 security-advisories@github.com
- https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0 security-advisories@github.com
- https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-3r68-hf9h-887v security-advisories@github.com
- https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-3r68-hf9h-887v 134c704f-9b21-4f2e-91b3-4a467353bcc0