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CVE-2026-84452

CVE-2026-84452 · Windows ML CLI: CORS misconfig enables localhost RCE

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Windows ML CLI is a command line tool for building portable, performant, and high-quality AI models for Windows ML. Prior to 0.4.0, the src/winml/modelkit/serve/cli_api.py component exposes WinML CLI commands through a localhost HTTP API without authentication and configures the allow_origins setting as a wildcard in both src/winml/modelkit/serve/cli_api.py and src/winml/modelkit/serve/app.py. A malicious website loaded by a user can send cross-origin requests to /v1/cli/build or /v1/cli/config and set the trust_remote_code parameter to true, which is converted to the --trust-remote-code command-line flag without validation. This reaches AutoConfig.from_pretrained with trust_remote_code=True in src/winml/modelkit/loader/_autoconfig.py and imports Python code from an attacker-controlled model repository, resulting in arbitrary code execution as the server user. This issue is fixed in version 0.4.0.

CVSS 8.6 · High · EPSS 1.6% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • winml-cli

    Versions
    • < 0.4.0: Affected

    No fix published

  • winml-cli PyPI

    Versions
    • 0.1.0
    • 0.2.0
    • 0.3.0
    • 0.3.1
    Affected ranges
    • ECOSYSTEM: < 0.4.0

    Update to 0.4.0

Original sources

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