Affected: parsl

Parsl is a Python parallel scripting library. A SQL Injection vulnerability exists in the parsl-visualize component of versions prior to 2026.01.05. The application constructs SQL queries using unsafe string formatting (Python % operator) with user-supplied input (workflow_id) directly from URL routes. This allows an unauthenticated attacker with access to the visualization dashboard to inject arbitrary SQL commands, potentially leading to data exfiltration or denial of service against the monitoring database. Version 2026.01.05 fixes the issue.

Affected: PyPI: parsl

**Affected Product:** Parsl (Python Parallel Scripting Library)

**Component:** parsl.monitoring.visualization

**Vulnerability Type:** SQL Injection (CWE-89)

**Severity:** High (CVSS Rating Recommended: 7.5 - 8.6)

**URL:** [https://github.com/Parsl/parsl/blob/master/parsl/monitoring/visualization/views.py]( https://github.com/Parsl/parsl/blob/master/parsl/monitoring/visualization/views.py)

**Summary**

A SQL Injection vulnerability exists in the parsl-visualize component of the Parsl library. The application constructs SQL queries using unsafe string formatting (Python % operator) with user-supplied input (workflow_id) directly from URL routes. This allows an unauthenticated attacker with access to the visualization dashboard to inject arbitrary SQL commands, potentially leading to data exfiltration or denial of service against the monitoring database.

**Root Cause Analysis**

The vulnerability is located in parsl/monitoring/visualization/views.py. Multiple route handlers take the workflow_id parameter from the URL and inject it directly into a raw SQL query string without sanitization or parameterization.

Vulnerable Code Snippet 1

``` query = """SELECT task.task_id, task.task_func_name, task.task_depends, status.task_status_name FROM task LEFT JOIN status ON task.task_id = status.task_id AND task.run_id = status.run_id AND status.timestamp = (SELECT MAX(status.timestamp)…