MCP Atlassian: Arbitrary File Read via Upload Attachment Tools

Summary The upload attachment tools in both Confluence and Jira accept arbitrary file paths without path traversal validation. The uploadattachment methods read any file accessible to the server process and upload it to a Confluence page or Jira issue. Despite the existence of a validatesafepath...

GHSA-F26R-J276-GGG4 MCP Atlassian: Arbitrary File Read via Upload Attachment Tools

Summary The upload attachment tools in both Confluence and Jira accept arbitrary file paths without path traversal validation. The uploadattachment methods read any file accessible to the server process and upload it to a Confluence page or Jira issue. Despite the existence of a validatesafepath...

Server-side Request Forgery (SSRF)

Overview mcp-atlassian is a The Model Context Protocol MCP Atlassian integration is an open-source implementation that bridges Atlassian products Jira and Confluence with AI language models following Anthropic's MCP specification. This project enables secure, contextual AI interactions with...

GHSA-MFV2-4WVM-9PGP MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read and exfiltration via MCP tool call

Summary The uploadattachment functions in both the Jira and Confluence modules accept a user-controlled filepath parameter and open the specified file for reading without calling validatesafepath. An authenticated MCP client can supply an arbitrary path such as /etc/passwd or /proc/self/environ,...

Directory Traversal

Overview mcp-atlassian is a The Model Context Protocol MCP Atlassian integration is an open-source implementation that bridges Atlassian products Jira and Confluence with AI language models following Anthropic's MCP specification. This project enables secure, contextual AI interactions with...

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: Arbitrary local file READ via unconstrained file_path in upload_attachment (Confluence + Jira)

Summary This is an arbitrary local file READ vulnerability on the Confluence and Jira uploadattachment tool paths. It's the symmetric counterpart of the file-write vulnerability you patched as CVE-2026-27825. The write direction was fixed; the read direction was left open. Reporter: Sean Valentin...

GHSA-F4P7-QX46-WC5J MCP Atlassian: Arbitrary local file READ via unconstrained file_path in upload_attachment (Confluence + Jira)

Summary This is an arbitrary local file READ vulnerability on the Confluence and Jira uploadattachment tool paths. It's the symmetric counterpart of the file-write vulnerability you patched as CVE-2026-27825. The write direction was fixed; the read direction was left open. Reporter: Sean Valentin...

MCP Atlassian: HTTP upload tools accept arbitrary server-local file paths

sooperset/mcp-atlassian: HTTP upload tools can attach arbitrary server-local files Date: 2026-05-05 Target: sooperset/mcp-atlassian Commit: d8bc78698a63cb6b321c7ca796d6329d448f7f6d Summary mcp-atlassian supports HTTP/SSE deployment for persistent, remote, and multi-user use. In that mode,...

GHSA-MRQ8-FV7V-HHJG MCP Atlassian: HTTP upload tools accept arbitrary server-local file paths

sooperset/mcp-atlassian: HTTP upload tools can attach arbitrary server-local files Date: 2026-05-05 Target: sooperset/mcp-atlassian Commit: d8bc78698a63cb6b321c7ca796d6329d448f7f6d Summary mcp-atlassian supports HTTP/SSE deployment for persistent, remote, and multi-user use. In that mode,...

Directory Traversal

Overview mcp-atlassian is a The Model Context Protocol MCP Atlassian integration is an open-source implementation that bridges Atlassian products Jira and Confluence with AI language models following Anthropic's MCP specification. This project enables secure, contextual AI interactions with...

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,...

GHSA-WV8V-V4C5-V75J 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,...

Directory Traversal

Overview mcp-atlassian is a The Model Context Protocol MCP Atlassian integration is an open-source implementation that bridges Atlassian products Jira and Confluence with AI language models following Anthropic's MCP specification. This project enables secure, contextual AI interactions with...

Incorrect Permission Assignment for Critical Resource

Overview mcp-atlassian is a The Model Context Protocol MCP Atlassian integration is an open-source implementation that bridges Atlassian products Jira and Confluence with AI language models following Anthropic's MCP specification. This project enables secure, contextual AI interactions with...

CVE-2026-77266

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-2026-77259

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-2026-77254

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-2026-77247

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, Jira and Confluence upload tools interpret caller-controlled path arguments on the MCP server and open those files before sending them as attachments. In remote or multi-user...

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...