CVE-2026-77269: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in sooperset mcp-atlassian
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the remediation for CVE-2026-27825 protects download destinations but does not constrain source paths used by attachment uploads. A caller can provide an absolute or traversal file_path and cause the server to upload the selected local file. The advisory traces the vulnerable input and processing flow through upload_attachment, file_path, and CVE-2026-27825, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.
AI Analysis
Technical Summary
MCP Atlassian, a Model Context Protocol server for Atlassian products, contained a path traversal vulnerability (CWE-22) prior to version 0.22.0. The vulnerability arises because the server does not properly constrain source file paths during attachment uploads, allowing a caller to specify absolute or traversal paths to upload arbitrary local files. This bypasses protections implemented for download destinations in a previous vulnerability fix (CVE-2026-27825). The vulnerability is fixed in version 0.22.0.
Potential Impact
An attacker with limited privileges can exploit this vulnerability to upload arbitrary local files to the server by specifying crafted file paths. This can lead to unauthorized file uploads, potentially exposing sensitive data or enabling further attacks. The CVSS score of 6.5 reflects a medium severity with high confidentiality impact but no integrity or availability impact.
Mitigation Recommendations
Upgrade MCP Atlassian to version 0.22.0 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory. Patch status is confirmed as fixed in 0.22.0.
CVE-2026-77269: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') 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, the remediation for CVE-2026-27825 protects download destinations but does not constrain source paths used by attachment uploads. A caller can provide an absolute or traversal file_path and cause the server to upload the selected local file. The advisory traces the vulnerable input and processing flow through upload_attachment, file_path, and CVE-2026-27825, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.
CVSS v3.1
Score 6.5medium
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
MCP Atlassian, a Model Context Protocol server for Atlassian products, contained a path traversal vulnerability (CWE-22) prior to version 0.22.0. The vulnerability arises because the server does not properly constrain source file paths during attachment uploads, allowing a caller to specify absolute or traversal paths to upload arbitrary local files. This bypasses protections implemented for download destinations in a previous vulnerability fix (CVE-2026-27825). The vulnerability is fixed in version 0.22.0.
Potential Impact
An attacker with limited privileges can exploit this vulnerability to upload arbitrary local files to the server by specifying crafted file paths. This can lead to unauthorized file uploads, potentially exposing sensitive data or enabling further attacks. The CVSS score of 6.5 reflects a medium severity with high confidentiality impact but no integrity or availability impact.
Mitigation Recommendations
Upgrade MCP Atlassian to version 0.22.0 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory. Patch status is confirmed as fixed in 0.22.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-20T19:14:21.330Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab2cd74f7a7c54106997ea3
Added to database: 09/22/2026, 18:48:20 UTC
Last enriched: 09/22/2026, 19:03:10 UTC
Last updated: 09/23/2026, 01:58:06 UTC
Views: 9
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