CVE-2026-6859 HIGH

CVE-2026-6859: Instructlab: instructlab: arbitrary code execution due to hardcoded `trust_remote_code=true`

Vendor Red Hat
Product Red Hat Enterprise Linux AI (RHEL AI) 3
Weakness CWE-829 · Inclusion from untrusted sphere
Published April 22, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

A flaw was found in InstructLab. The `linux_train.py` script hardcodes `trust_remote_code=True` when loading models from HuggingFace. This allows a remote attacker to achieve arbitrary Python code execution by convincing a user to run `ilab train/download/generate` with a specially crafted malicious model from the HuggingFace Hub. This vulnerability can lead to complete system compromise.

Key dates

02Disclosure timeline

April 22, 2026 CVE published
June 30, 2026 Record updated