CVE-2026-77258

Published: Set 22, 2026 Last Modified: Set 23, 2026

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 7,7

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: low

User Interaction: none

Scope: changed

Confidentiality: high

Integrity: none

Availability: none

Description

AI Translation Available

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, upload_attachment in src/mcp_atlassian/confluence/attachments.py accepts a caller-controlled file_path and opens the selected server-local file without restricting it to the workspace. A permitted Confluence MCP caller can upload the file as an attachment and disclose data readable by the server process. This issue is fixed in version 0.22.0.