MCP Atlassian: Incomplete path traversal fix allows intra-CWD module overwrite and RCE (bypass of GHSA-xjgw-4wvw-rgm4)

Date Sep 22, 2026

Type Vendor advisory

Signal High-risk advisory

Vendor / Product PyPI · mcp-atlassian

CVE CVE-2026-77271

High-risk advisory CVE-2026-77271

Summary

MCP Atlassian: Incomplete path traversal fix allows intra-CWD module overwrite and RCE (bypass of GHSA-xjgw-4wvw-rgm4)

Why it matters

GitHub has published a reviewed security advisory for mcp-atlassian. Prioritize it with other application dependency updates.

Operator check

Check whether mcp-atlassian is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 8.3.

Sources

GitHub Advisory GHSA-6vmq-24h2-pj7j NVD — CVE-2026-77271 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

Get watched-vendor alerts Subscribe free Back to feed