CVE-2026-27489

Name: CVE-2026-27489
Creator: NVD / NIST
Published: 2026-04-01T18:16:28.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2026-27489 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

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

CVSS 4.0

8.7/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.52%

40.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linuxfoundation	Onnx	< 1.21.0

References

https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cbPatch
https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73Exploit, Mitigation, Patch, Vendor Advisory

Timeline

Published: Apr 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-27489?

How severe is CVE-2026-27489?

CVE-2026-27489 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2026-27489?

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-2026-27489?

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

Scan your code now

Source: NVD / NIST