CVE-2026-77269
MEDIUMCVSS 6.5Description
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.
Timeline
Published:September 22nd, 2026 7:16 PM
Last modified:September 29th, 2026 12:53 PM
CVSS Scoring
CVSS v3: 6.5 (MEDIUM)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Software
From NVD CPE configuration data
Vendors
mcp-atlassian
Products
mcp_atlassian
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460Patch
- https://github.com/sooperset/mcp-atlassian/pull/1448Issue Tracking
- https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0Release Notes
- https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-h7wj-5v37-59r2Exploit
- https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-h7wj-5v37-59r2Exploit
Source: NIST NVD · Data may lag official sources by up to one minute