CVE-2026-6859

Instructlab: instructlab: arbitrary code execution due to hardcoded `trust_remote_code=true`

State: Published
Severity: 8.8 High
Published: Apr 22, 2026
Updated: Jul 15, 2026
Reserved: Apr 22, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	redhat
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	redhat-SADP

Weaknesses

CWE-829 Inclusion of Functionality from Untrusted Control Sphere

Affected Products

Product	Versions
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat
Red Hat Enterprise Linux AI (RHEL AI) 3Red Hat

References

https://access.redhat.com/security/cve/CVE-2026-6859vdb-entry
RHBZ#2459998issue-tracking
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6859.json

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