CVE-2026-73496
- Source
- https://cve.org/CVERecord?id=CVE-2026-73496
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73496.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-73496
- Aliases
- Published
- 2026-09-14T19:49:03Z
- Modified
- 2026-10-28T02:30:25Z
- Severity
-
- 7.7 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
- Summary
- MCP Atlassian: Arbitrary server-side file read via attachment upload
- Details
-
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the confluence_upload_attachment and confluence_upload_attachments tools pass a client-controlled file_path through src/mcp_atlassian/confluence/attachments.py upload_attachment, and the jira_update_issue attachments parameter reaches src/mcp_atlassian/jira/attachments.py upload_attachment, without confining either path to an approved server workspace. In a remote HTTP, SSE, or multi-user deployment, absolute or traversing paths are resolved on the MCP server and uploaded to Atlassian, allowing a client with write-tool access to disclose server files, environment-held Atlassian credentials, or another tenant's data. A local single-user stdio deployment does not cross this trust boundary because the server runs in the caller's environment. This issue is fixed in version 0.22.0.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-22", "CWE-73" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73496.json" }- References
-
- https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73496.json
- https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-wm45-qh3g-v83f
- https://nvd.nist.gov/vuln/detail/CVE-2026-73496
- https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460
- https://github.com/sooperset/mcp-atlassian/pull/1448
Affected packages
Git / github.com/sooperset/mcp-atlassian
Affected ranges
- Type
- GIT
- Repo
- https://github.com/sooperset/mcp-atlassian
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "0.22.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "b041733473f95119dd539542a43c280737a8e460" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v0.22.0", "range": [ { "fixed": "b041733473f95119dd539542a43c280737a8e460" } ], "source": "REFERENCES_TAG" }, { "range": [ { "introduced": "0" }, { "fixed": "0.22.0" } ], "source": "DESCRIPTION" } ] }