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-2026-77274

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-2026-77271: 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, validatesafepath defaults its base directory to os.getcwd, and affected Confluence attachment call sites omit basedir, allowing attacker-selected writes within the working directory...

PT-2026-96928

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description An arbitrary local file read issue exists in the Confluence and Jira upload attachment tool paths. The implementation accepts an unconstrained file path and opens the referenced server-local...

PT-2026-96931

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions 0.17.0 through 0.21.0 Description An incomplete path traversal fix allows attacker-selected writes within the working directory. The function validate safe path defaults its base dir to the current working directory...

PT-2026-96903

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description The Jira and Confluence attachment upload tools fail to validate file paths, allowing for path traversal. An authenticated MCP client or an AI assistant manipulated via prompt injection can...

CVE-2026-77255: 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, the Jira updateissue attachments argument is converted into local paths and routed to the attachment upload implementation without workspace validation. A caller can make the MCP serv...

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-2026-77266: 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-2026-77262: 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...

CVE-2026-77249: Server-Side Request Forgery (SSRF)

MCP Atlassian is a Model Context Protocol MCP server for Atlassian products Confluence and Jira. Prior to 0.22.0, JiraUserMixin.lookupuserbypermissions uses the module-level requests.get function instead of the fetcher's protected session. A caller-controlled public Jira URL can redirect that...

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-2026-77267: Server-Side Request Forgery (SSRF)

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-2026-77274: Server-Side Request Forgery (SSRF)

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-2026-77258: 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...

PT-2026-96902

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description An unauthenticated caller can perform a Server-Side Request Forgery SSRF attack using a DNS-rebinding technique. The software employs a validate-then-use pattern where the validate url for ssr...