CVE-2026-77269 MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read (incomplete fix for CVE-2026-27825)

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 filepat...

CVE-2026-77269

The MCP Atlassian Model Context Protocol server for Confluence and Jira is vulnerable to a path traversal flaw in the upload_attachment function prior to version 0.22.0 . While a previous fix for CVE-2026-27825 protected download destinations, it failed to constrain source paths for uploads. An a...

EUVD-2026-84747

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, uploadattachment accepts absolute paths and traversal sequences without constraining the resolved path to the server workspace. An MCP caller with attachment access can read a chosen...

CVE-2026-77271

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, validatesafepath defaults its base directory to os.getcwd, and affected Confluence attachment call sites omit basedir, allowing attacker-selected writes within the working directory...

CVE-2026-77252

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, caller-supplied projectsfilter and spacesfilter arguments can replace administrator-configured allowlists, and caller-provided project or space clauses can suppress the configured...

CVE-2026-77265

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, header-supplied Jira or Confluence URLs are resolved and validated before the HTTP client resolves the hostname again for the connection. An unauthenticated caller can use a...

CVE-2026-77260

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the Confluence and Jira uploadattachment implementations accept an unconstrained filepath and open the referenced server-local file. A permitted MCP caller can upload sensitive host...

CVE-2026-77267

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the X-Atlassian-Jira-Url and X-Atlassian-Confluence-Url headers are processed by processauthenticationheaders and used to construct Atlassian fetchers without calling...

CVE-2026-77258

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, uploadattachment in src/mcpatlassian/confluence/attachments.py accepts a caller-controlled filepath and opens the selected server-local file without restricting it to the workspace. A...

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-2026-77262 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...

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-2026-77254

The mcp-atlassian Model Context Protocol server (versions prior to 0.22.0 ) contains a vulnerability where unauthenticated HTTP MCP requests can bypass per-user identity checks. The flaw allows a network caller to reach tool handlers that utilize globally configured Jira and Confluence credential...

EUVD-2026-84743

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, requests to the HTTP MCP endpoint without a per-user identity are allowed to reach tool handlers, which then use globally configured Jira or Confluence credentials. A network caller c...

CVE-2026-77254 MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Confluence credentials

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, requests to the HTTP MCP endpoint without a per-user identity are allowed to reach tool handlers, which then use globally configured Jira or Confluence credentials. A network caller c...

CVE-2026-77260 MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment (Confluence + Jira)

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the Confluence and Jira uploadattachment implementations accept an unconstrained filepath and open the referenced server-local file. A permitted MCP caller can upload sensitive host...

CVE-2026-77260 MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment (Confluence + Jira)

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the Confluence and Jira uploadattachment implementations accept an unconstrained filepath and open the referenced server-local file. A permitted MCP caller can upload sensitive host...

EUVD-2026-84630

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the Confluence and Jira uploadattachment implementations accept an unconstrained filepath and open the referenced server-local file. A permitted MCP caller can upload sensitive host...