Medium severity6.5NVD Advisory· Published Sep 22, 2026· Updated Sep 29, 2026
CVE-2026-77269
CVE-2026-77269
Description
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the remediation for CVE-2026-27825 protects download destinations but does not constrain source paths used by attachment uploads. A caller can provide an absolute or traversal file_path and cause the server to upload the selected local file. The advisory traces the vulnerable input and processing flow through 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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
mcp-atlassianPyPI | < 0.22.0 | 0.22.0 |
Affected products
3- Range: <0.22.0
<0.22.0+ 1 more
- (no CPE)range: <0.22.0
- cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:*range: <0.22.0
Patches
Vulnerability mechanics
References
5- github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460nvdPatchWEB
- github.com/sooperset/mcp-atlassian/pull/1448nvdIssue TrackingPatchWEB
- github.com/sooperset/mcp-atlassian/security/advisories/GHSA-h7wj-5v37-59r2nvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-h7wj-5v37-59r2ghsaADVISORY
- github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0nvdRelease NotesWEB
News mentions
1- Atlassian MCP: 25 Coordinated Vulnerabilities Expose Jira, Confluence IntegrationsVypr Intelligence · Sep 22, 2026