High 8.8Published Apr 22, 2026

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

Updated under an hour ago (Oct 26, 2026, 2:10 PM ET)

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It affects Red Hat Enterprise Linux AI (RHEL AI) 3 and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-829
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3 redhat:enterprise_linux_ai	3	CNA record
Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3 redhat:enterprise_linux_ai	3	CISA ADP
redhat instructlab redhat:instructlab	all versions	NVD
redhat enterprise_linux_ai redhat:enterprise_linux_ai	3.0	NVD

References

References

https://access.redhat.com/security/cve/CVE-2026-6859	vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2459998	issue-tracking, x-refsource-redhat, vendor-advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6859.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.