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CVE-2026-28500

8.6 · HIGH

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability.

Published Mar 18, 2026CWE-345EPSS 0.32%

Overview

CVE-2026-28500 is a high-severity vulnerability. It was published on March 18, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. In versions up to and including 1.20.1, a security control bypass exists in onnx.hub.load() due to improper logic in the repository trust verification mechanism. While the function is designed to warn users when loading models from non-official sources, the use of the silent=True parameter completely suppresses all security warnings and confirmation prompts. This vulnerability transforms a standard model-loading function into a vector for Zero-Interaction Supply-Chain Attacks. When chained with file-system vulnerabilities, an attacker can silently exfiltrate sensitive files (SSH keys, cloud credentials) from the victim's machine the moment the model is loaded. As of time of publication, no known patched versions are available.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/ZeroXJacks/CVEs/blob/main/2026/CVE-2026-28500.mdGitHubgithub.com/onnx/onnx/security/advisories/GHSA-hqmj-h5c6-369mRefaccess.redhat.com/errata/RHSA-2026:24977Refaccess.redhat.com/security/cve/CVE-2026-28500Refbugzilla.redhat.com/show_bug.cgi?id=2448518GitHubgithub.com/ZeroXJacks/CVEs/blob/main/2026/CVE-2026-28500.mdRefsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28500.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-28500?

CVE-2026-28500 is a high-severity vulnerability. It was published on March 18, 2026 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2026-28500?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-28500?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-28500?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-28500 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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