High 8.7Published Apr 1, 2026

CVE-2026-27489ONNX: Path Traversal via Symlink

Updated under an hour ago (Oct 27, 2026, 5:23 AM ET)

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It affects onnx and 2 other products. 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

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, a path traversal vulnerability via symlink allows to read arbitrary files outside model or user-provided directory. This issue has been patched in version 1.21.0.

CVSS: 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-23, CWE-61, CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

onnx onnx onnx:onnx (from the name)	before 1.21.0	CNA record
Red Hat Red Hat OpenShift AI 2.25 redhat:openshift_ai	from 1780078312 not affected	CISA ADP
linuxfoundation onnx linuxfoundation:onnx	before 1.21.0	NVD

References

References

https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73	x-refsource-confirm, exploit, mitigation, patch, vendor-advisory
https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb	x-refsource-misc, patch
https://access.redhat.com/errata/RHSA-2026:24977
https://access.redhat.com/security/cve/CVE-2026-27489
https://bugzilla.redhat.com/show_bug.cgi?id=2453929
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27489.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.