CVE-2026-77243
CVE-2026-77243
8.8
HighPublished:
Last updated:
Source:security-advisories@github.com
Analyzed
Weakness (CWE)
CVSS Vector
v3.1- Attack Vector
- Network
- Attack Complexity
- Low
- Privileges Required
- Low
- User Interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Description
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.
References
security-advisories@github.com
https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460security-advisories@github.com
https://github.com/sooperset/mcp-atlassian/pull/1448security-advisories@github.com
https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0security-advisories@github.com
https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-3r68-hf9h-887v134c704f-9b21-4f2e-91b3-4a467353bcc0
https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-3r68-hf9h-887v