MCP Atlassian: OAuth fallback token storage writes plaintext access and refresh tokens with group-readable permissions

SummaryWhen OAuth tokens are saved, MCP Atlassian always writes a plaintext fallback copy under /.mcp-atlassian/oauth-.json. The fallback file is created with the process default umask rather than restrictive permissions. In this environment the file was created as mode 0664, exposing access and...

PT-2026-96953

Name of the Vulnerable Software and Affected Versions MCP Atlassian versions prior to 0.22.0 Description The OAuth fallback token directory and JSON files are created without restrictive owner-only permissions, typically resulting in world-readable files mode 0644 on Linux and directories mode...