CVE-2026-77253

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, Jira and Confluence attachment upload tools accept arbitrary local filesystem paths and send the selected bytes to Atlassian. In HTTP or multi-user deployments, a caller can cross the client-to-server filesystem boundary and disclose configuration, credentials, mounted secrets, or other files readable by the MCP process. The advisory traces the vulnerable input and processing flow through jira_upload_attachment, confluence_upload_attachment, file_path, and server-local filesystem, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.
Configurations

Configuration 1 (hide)

cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:*

History

28 Sep 2026, 13:23

Type Values Removed Values Added
CPE cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:*
First Time Mcp-atlassian
Mcp-atlassian mcp Atlassian
References () https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 - () https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 - Patch
References () https://github.com/sooperset/mcp-atlassian/pull/1448 - () https://github.com/sooperset/mcp-atlassian/pull/1448 - Issue Tracking, Patch
References () https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0 - () https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0 - Release Notes
References () https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-vc25-24vv-fxxm - () https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-vc25-24vv-fxxm - Exploit, Vendor Advisory

22 Sep 2026, 19:16

Type Values Removed Values Added
New CVE

Information

Published : 2026-09-22 19:16

Updated : 2026-09-28 13:23


NVD link : CVE-2026-77253

Mitre link : CVE-2026-77253

CVE.ORG link : CVE-2026-77253


JSON object : View

Products Affected

mcp-atlassian

  • mcp_atlassian
CWE
CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')