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CVE-2026-34446

ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
onnx / onnxaffected < 1.21.0

CWE

CWE-22, CWE-61

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.