CVE-2026-77243: CWE-862: Missing Authorization in sooperset 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.
AI Analysis
Technical Summary
The vulnerability in sooperset mcp-atlassian (a Model Context Protocol server for Atlassian products) arises because ENABLED_TOOLS and TOOLSETS are only checked when tools are listed but not rechecked when a tools/call request is dispatched. This allows an attacker with knowledge of hidden tool names to directly invoke restricted tools, bypassing configured authorization controls. The affected code paths include ENABLED_TOOLS, TOOLSETS, tools/list, tools/call, and _call_tool_mcp. The issue is fixed in version 0.22.0.
Potential Impact
An attacker with low privileges can bypass authorization controls to invoke read, write, or delete operations on tools that should be excluded, potentially leading to full compromise of confidentiality, integrity, and availability of the system. The CVSS 3.1 base score is 8.8 (high severity) reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade to version 0.22.0 or later where this missing authorization vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
CVE-2026-77243: CWE-862: Missing Authorization in sooperset mcp-atlassian
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.
CVSS v3.1
Score 8.8high
Affected software
sooperset
mcp-atlassian
pkg:github/sooperset/mcp-atlassianRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in sooperset mcp-atlassian (a Model Context Protocol server for Atlassian products) arises because ENABLED_TOOLS and TOOLSETS are only checked when tools are listed but not rechecked when a tools/call request is dispatched. This allows an attacker with knowledge of hidden tool names to directly invoke restricted tools, bypassing configured authorization controls. The affected code paths include ENABLED_TOOLS, TOOLSETS, tools/list, tools/call, and _call_tool_mcp. The issue is fixed in version 0.22.0.
Potential Impact
An attacker with low privileges can bypass authorization controls to invoke read, write, or delete operations on tools that should be excluded, potentially leading to full compromise of confidentiality, integrity, and availability of the system. The CVSS 3.1 base score is 8.8 (high severity) reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade to version 0.22.0 or later where this missing authorization vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-20T19:02:23.416Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab2c670f7a7c541068f922c
Added to database: 09/22/2026, 18:18:24 UTC
Last enriched: 09/22/2026, 18:32:49 UTC
Last updated: 09/22/2026, 19:18:25 UTC
Views: 5
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