MCP Atlassian: Path Traversal / Arbitrary File Read in confluence_upload_attachment MCP tool (incomplete fix of GHSA-xjgw-4wvw-rgm4)

Summary mcp-atlassian exposes an MCP tool confluenceuploadattachment whose filepath argument is passed directly to openfilepath, "rb" without any path validation. An attacker able to invoke the tool can read arbitrary files readable by the server process and exfiltrate them into a multipart uploa...

MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of server credentials

Summary Missing path validation in confluenceuploadattachment allows any authenticated MCP client to read arbitrary files from the server filesystem and exfiltrate their contents to Confluence. On Linux deployments, /proc/self/environ yields all runtime secrets in a single call. --- Details...

MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read (incomplete fix for CVE-2026-27825)

Summary The confluenceuploadattachment and confluenceuploadattachments MCP tools accept a filepath parameter and do not validate that the path is confined to an allowed directory before opening the file. An attacker who can call these tools can read any file accessible to the MCP server process S...

MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment Upload Path

Summary The mcp-atlassian server exposes an MCP tool confluenceuploadattachment and the Jira attachment variant that accepts an arbitrary server-side file path and opens it for upload without any path validation. When the server is deployed in HTTP transport mode streamable-http or sse, a remote,...

CVE-2026-77262

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, confluenceuploadattachment accepts an attacker-controlled filepath and does not apply the path restriction added for the earlier download vulnerability. A caller can traverse outside...

CVE-2026-77259

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, confluenceuploadattachment opens a caller-selected server-local file without checking that the resolved path remains in the workspace. A caller can upload environment files,...

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...

CVE-2026-77246

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, an HTTP transport deployment with READONLYMODE=false accepts a request without an Authorization identity and permits attacker-controlled Atlassian service headers, including...

CVE-2026-77246 MCP Atlassian: MCP HTTP Client Server-Local File Exfiltration via Unvalidated Attachment Upload Path

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, an HTTP transport deployment with READONLYMODE=false accepts a request without an Authorization identity and permits attacker-controlled Atlassian service headers, including...

CVE-2026-77246

MCP Atlassian , a Model Context Protocol server for Confluence and Jira, is vulnerable to server-local file exfiltration in versions prior to 0.22.0 . In an HTTP transport deployment where READ_ONLY_MODE=false , the server accepts requests without an Authorization identity and allows attacker-con...

EUVD-2026-84771

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, an HTTP transport deployment with READONLYMODE=false accepts a request without an Authorization identity and permits attacker-controlled Atlassian service headers, including...

CVE-2026-77259 MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of server credentials

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, confluenceuploadattachment opens a caller-selected server-local file without checking that the resolved path remains in the workspace. A caller can upload environment files,...

EUVD-2026-84758

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, confluenceuploadattachment opens a caller-selected server-local file without checking that the resolved path remains in the workspace. A caller can upload environment files,...

CVE-2026-77259

The MCP Atlassian Model Context Protocol server (for Confluence and Jira) is vulnerable to an arbitrary file read issue prior to version 0.22.0 . The confluence_upload_attachment function fails to verify that a caller-selected server-local file path remains within the intended workspace. This all...

CVE-2026-77270

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the Jira and Confluence attachment upload tools treat caller-controlled filepath values as trusted server-local paths. The server opens the selected file and uploads it to an Atlassia...

EUVD-2026-84744

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, confluenceuploadattachment accepts an attacker-controlled filepath and does not apply the path restriction added for the earlier download vulnerability. A caller can traverse outside...

CVE-2026-77262

The MCP Atlassian (sooperset/mcp-atlassian) server is vulnerable to a Path Traversal vulnerability in the confluence_upload_attachment tool prior to version 0.22.0 . The root cause is the lack of path validation on the file_path argument, which is passed directly to the open() function. This allo...

CVE-2026-77262 MCP Atlassian: Path Traversal / Arbitrary File Read in confluence_upload_attachment MCP tool (incomplete fix of CVE-2026-27825)

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, confluenceuploadattachment accepts an attacker-controlled filepath and does not apply the path restriction added for the earlier download vulnerability. A caller can traverse outside...

CVE-2026-77253 MCP Atlassian: Jira and Confluence attachment upload tools can read arbitrary server-local files

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...

EUVD-2026-84742

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...