How severe is CVE-2026-34446?

CVE-2026-34446 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-34446 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34446?

CVE-2026-34446 affects Linuxfoundation Onnx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34446?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-34446 have an EU (EUVD) identifier?

Yes. CVE-2026-34446 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17987.

When was CVE-2026-34446 published?

CVE-2026-34446 was published on 2026-04-01 and last updated on 2026-06-17.

CVE-2026-34446

CVE-2026-34446 is a medium-severity vulnerability in Linuxfoundation Onnx with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17987
Weakness: CWE-22
Affected product: Linuxfoundation Onnx
Published: 2026-04-01
Last modified: 2026-06-17

Description

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, there is an issue in onnx.load, the code checks for symlinks to prevent path traversal, but completely misses hardlinks because a hardlink looks exactly like a regular file on the filesystem. This issue has been patched in version 1.21.0.

Frequently asked questions

What is CVE-2026-34446?: Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, there is an issue in onnx.load, the code checks for symlinks to prevent path traversal, but completely misses hardlinks because a hardlink looks exactly like a regular file on the filesystem. This issue has been patched in version 1.21.0.
How severe is CVE-2026-34446?: CVE-2026-34446 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-34446 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34446?: CVE-2026-34446 affects Linuxfoundation Onnx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34446?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-34446 have an EU (EUVD) identifier?: Yes. CVE-2026-34446 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17987.
When was CVE-2026-34446 published?: CVE-2026-34446 was published on 2026-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linuxfoundation:onnx:*:*:*:*:*:*:*:*

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CVE-2025-51480 — High (CVSS 8.8): Path Traversal vulnerability in onnx.external_data_helper.save_external_data in ONNX 1.17.0 allows attackers to…
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