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    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.

    Published:Apr 1, 2026
    Last Modified:Apr 15, 2026
    EPS:Apr 1, 2026
    EPSS Score:0.00011
    CVSS Score:4.7

    Affected Products

    Vendor
    Linuxfoundation
    Product
    Onnx
    Vendor
    Onnx
    Product
    Onnx

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-34447 (CVSS 5.5) — Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to versio…
    CVE-2026-27489 (CVSS 8.7) — Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to versio…
    CVE-2026-34445 (CVSS 8.6) — Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to versio…
    CVE-2026-28500 (CVSS 8.6) — Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. In versions up …
    CVE-2025-51480 (CVSS 8.8) — Path Traversal vulnerability in onnx.external_data_helper.save_external_data in ONNX 1.17.0 allows attackers t…
    CVE-2024-5187 (CVSS 8.8) — A vulnerability in the `download_model_with_test_data` function of the onnx/onnx framework, version 1.16.0, al…
    CVE-2024-27319 (CVSS 4.4) — Versions of the package onnx before and including 1.15.0 are vulnerable to Out-of-bounds Read as the ONNX_ASSE…
    CVE-2024-27318 (CVSS 7.5) — Versions of the package onnx before and including 1.15.0 are vulnerable to Directory Traversal as the external…
    CVE-2022-25882 (CVSS 7.5) — Versions of the package onnx before 1.13.0 are vulnerable to Directory Traversal as the external_data field of…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High