PyPI/mcp-atlassian CVE-2026-77270: medium 6.5, EPSS 0.37%

MCP Atlassian: Arbitrary File Read via Upload Attachment Tools

Action: Upgrade mcp-atlassian to 0.22.0 or later.

pip install mcp-atlassian==0.22.0

Affected

Fixed versions

Sources

• osv: GHSA-f26r-j276-ggg4
• https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-f26r-j276-ggg4
• https://nvd.nist.gov/vuln/detail/CVE-2026-77270
• https://github.com/sooperset/mcp-atlassian/pull/1448
• https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460
• https://github.com/sooperset/mcp-atlassian
• https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0

CVE-2026-77270 · published 2026-09-22T20:35:11Z · modified 2026-10-01T17:55:52.611132577Z · JSON