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.
References
| Link | Resource |
|---|---|
| https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460 | Patch |
| https://github.com/sooperset/mcp-atlassian/pull/1448 | Issue Tracking Patch |
| 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 | Exploit Vendor Advisory |
| https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-vc25-24vv-fxxm | Exploit Vendor Advisory |
Configurations
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 - Patch | |
| References | () https://github.com/sooperset/mcp-atlassian/pull/1448 - Issue Tracking, Patch | |
| References | () 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 - 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')
