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    CVE-2026-77262

    MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, confluence_upload_attachment accepts an attacker-controlled file_path and does not apply the path restriction added for the earlier download vulnerability. A caller can traverse outside the workspace and upload arbitrary server-readable files to Confluence. The advisory traces the vulnerable input and processing flow through confluence_upload_attachment, file_path, and CVE-2026-27825, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

    Published:Sep 22, 2026
    Last Modified:Sep 29, 2026
    EPS:Sep 22, 2026
    EPSS Score:0.00538
    CVSS Score:8.6

    Affected Products

    Vendor
    Mcp-atlassian
    Product
    Mcp Atlassian
    Vendor
    Sooperset
    Product
    Mcp-atlassian

    Exploits

    https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-p6hp-93wp-fh6phttps://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-p6hp-93wp-fh6phttps://github.com/romain-deperne/CVE-2026-77262

    Related CVEs

    CVE-2026-77246 (CVSS 7.4) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77248 (CVSS 8.6) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77256 (CVSS 8.3) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77249 (CVSS 5.3) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77259 (CVSS 7.7) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77268 (CVSS 5.5) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77247 (CVSS 8.3) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77272 (CVSS 5.4) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77269 (CVSS 6.5) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …
    CVE-2026-77266 (CVSS 6.5) — MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High