{"cve":"CVE-2026-84452","nvd":{"published":"2026-09-02T20:17:41.350","modified":"2026-09-28T23:10:00.143","status":"Deferred","description":"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_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.6},"cvss_v3":null,"cwes":["CWE-306","CWE-942"],"references":["https://github.com/microsoft/winml-cli/commit/f4073e0ef4700a25b623487e7e45c421ca0b9993","https://github.com/microsoft/winml-cli/pull/1321","https://github.com/microsoft/winml-cli/security/advisories/GHSA-96p9-rh4f-92cf","https://github.com/microsoft/winml-cli/security/advisories/GHSA-96p9-rh4f-92cf"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-84452","score":0.01608,"percentile":0.75917,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-96p9-rh4f-92cf","url":"https://osv.dev/vulnerability/GHSA-96p9-rh4f-92cf","summary":"Windows ML CLI: CORS misconfig enables localhost RCE","modified":"2026-09-10T12:25:25.044897858Z","packages":[{"ecosystem":"PyPI","name":"winml-cli","purl":"pkg:pypi/winml-cli","ranges":["<0.4.0"],"fixed":["0.4.0"]}]},{"id":"PYSEC-2026-3944","url":"https://osv.dev/vulnerability/PYSEC-2026-3944","summary":"Windows ML CLI: CORS misconfig enables localhost RCE","modified":"2026-09-10T12:15:13.712070116Z","packages":[{"ecosystem":"PyPI","name":"winml-cli","purl":"pkg:pypi/winml-cli","ranges":["<0.4.0"],"fixed":["0.4.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}