CVE-2026-6859

Name: CVE-2026-6859
Creator: NVD / NIST
Published: 2026-04-22T14:17:07.687+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2026-6859 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A flaw was found in InstructLab. The `linux_train.py` script hardcodes `trust_remote_code=True` when loading models from HuggingFace. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.35%

27.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-829

Affected Software

Vendor	Product	Versions
Redhat	Instructlab	All versions
Redhat	Enterprise Linux Ai	3.0

References

https://access.redhat.com/security/cve/CVE-2026-6859Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2459998Issue Tracking, Vendor Advisory

Timeline

Published: Apr 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-6859?

How severe is CVE-2026-6859?

CVE-2026-6859 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2026-6859?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-6859?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST