CVE-2026-77244 [mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier accepts any non-empty token

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the HTTP transport accepts requests without a verified user identity and downstream fetcher construction falls back to the operator's globally configured Jira or Confluence credential...

CVE-2026-77244

The MCP Atlassian server (Model Context Protocol for Atlassian products) is vulnerable prior to version 0.22.0 due to a flaw in the HTTP transport . The system accepts requests without verifying user identity, causing the downstream fetcher to fall back to the operator's globally configured Jira ...

CVE-2026-77244 [mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier accepts any non-empty token

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, the HTTP transport accepts requests without a verified user identity and downstream fetcher construction falls back to the operator's globally configured Jira or Confluence credential...

EUVD-2026-84606

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-2026-77265

The mcp-atlassian Model Context Protocol server is vulnerable to Server-Side Request Forgery (SSRF) via DNS rebinding in versions prior to 0.22.0 . The flaw exists in the header-based authentication flow where the software uses a validate-then-use pattern. Specifically, the validate_url_for_ssrf ...

CVE-2026-77265 MCP Atlassian: SSRF via DNS Rebinding in Header-Based Authentication Flow

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-2026-77265 MCP Atlassian: SSRF via DNS Rebinding in Header-Based Authentication Flow

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-2026-77265 MCP Atlassian: SSRF via DNS Rebinding in Header-Based Authentication Flow

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...

EUVD-2026-84650

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-2026-77258

The MCP Atlassian Model Context Protocol server is vulnerable to arbitrary file read and exfiltration in versions prior to 0.22.0 . The root cause is that the upload_attachment method in src/mcp_atlassian/confluence/attachments.py fails to call validate_safe_path(), allowing a permitted caller (o...

CVE-2026-77258 MCP Atlassian: Arbitrary file read/exfiltration via upload_attachment missing validate_safe_path()

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-2026-77258 MCP Atlassian: Arbitrary file read/exfiltration via upload_attachment missing validate_safe_path()

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-2026-77258 MCP Atlassian: Arbitrary file read/exfiltration via upload_attachment missing validate_safe_path()

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-2026-77274

The mcp-atlassian MCP server (prior to version 0.22.0 ) is vulnerable to a Server-Side Request Forgery (SSRF) due to a parser mismatch in the validate_url_for_ssrf() function. The vulnerability occurs during the header-based Jira and Confluence URL authentication flow where urllib.parse.urlparse(...

EUVD-2026-84649

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, validateurlforssrf has a backslash authority confusion because it interprets the authority differently from the Requests connection layer in the header-based Jira and Confluence URL...

CVE-2026-77266: Improper Limitation of a Pathname to a Restricted Directory

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-2026-77254: Missing Authentication for Critical Function

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-2026-77246: Improper Limitation of a Pathname to a Restricted Directory

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-2026-77258: Improper Limitation of a Pathname to a Restricted Directory

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: Improper Limitation of a Pathname to a Restricted Directory

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...