CVE-2026-77253

Description

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.

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Produits concernés

• sooperset mcp-atlassian
• Mcp-atlassian mcp atlassian

Scores CVSS

Faiblesses (CWE)

• CWE-22

Références

• https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 Patch
• https://github.com/sooperset/mcp-atlassian/pull/1448 Issue TrackingPatch
• https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0 Release Notes
• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-vc25-24vv-fxxm ExploitVendor Advisory
• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-vc25-24vv-fxxm ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories