Path traversal in sooperset mcp-atlassian
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.
Summary
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, confluence_upload_attachment passes its client-supplied file_path directly to open(file_path, "rb") in src/mcp_atlassian/confluence/attachments.py through _upload_attachment_direct() without calling validate_safe_path. An authenticated MCP client can read any file accessible to the server process and exfiltrate it to Confluence as an attachment. If an AI agent can be induced to call the tool through untrusted content, the same flaw can disclose server environment variables such as CONFLUENCE_API_TOKEN and other credentials. This issue is fixed in version 0.22.0.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| sooperset | mcp-atlassian | before 0.22.0 | 0.22.0 | Patch available | CNA |
| — | mcp-atlassian (PyPI) | before 0.22.0 | 0.22.0 | Patch available | GHSA-g5r6-gv6m-f5jv |
- mcp-atlassian Vendorsooperset Affected before 0.22.0 Fixed in 0.22.0 Patch available CNA
- mcp-atlassian (PyPI) Vendor— Affected before 0.22.0 Fixed in 0.22.0 Patch available GHSA-g5r6-gv6m-f5jv
CPE names Threatist (inferred) · 1
Inferred from how NVD named this product before; not given by a source.
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:* | — | — | Mcp-atlassian |
- cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:* Versions — — ·Mcp-atlassian
Remediation
- Fix · CNA mcp-atlassian (sooperset) Fixed in 0.22.0
- Fix · GHSA-g5r6-gv6m-f5jv mcp-atlassian (PyPI) Fixed in 0.22.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-73498
- 2026-10-03 Alias added: GHSA-g5r6-gv6m-f5jv
References
Other 5
- https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-g5r6-gv6m-f5jv
- https://github.com/sooperset/mcp-atlassian/pull/1448
- https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460
- https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0
- https://github.com/sooperset/mcp-atlassian
More sooperset vulnerabilities
- TI-2026-53938 MCP Atlassian: Unauthenticated HTTP MCP requests can use globally configured Jira and Confluence credentials CVSS 3.1CRITICAL 9.1
- TI-2026-53957 MCP Atlassian: SSRF Protection Bypass CVSS 4.0HIGH 8.8
- TI-2026-53935 Protection mechanism failure in sooperset mcp-atlassian CVSS 4.0HIGH 8.3
- TI-2026-53946 Path traversal in sooperset mcp-atlassian CVSS 3.1HIGH 8.6
- TI-2026-53932 Path traversal in sooperset mcp-atlassian CVSS 3.1HIGH 8.6
- TI-2026-22177 Path traversal in sooperset mcp-atlassian CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-73498 · CVE Program
- CVE-2026-73498 · NVD
- FIRST EPSS
- GHSA-g5r6-gv6m-f5jv · GitHub Advisory Database · CC BY 4.0
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