CVE-2026-55832 — Tract: Arbitrary file read via unsanitized ONNX external_data `location` (path traversal) on model load in tract-onnx

Description (CNA)

Tract is a tiny, no-nonsense, self-contained TensorFlow and ONNX inference toolkit. Prior to 0.21.17, 0.22.3, and 0.23.2, the tract-onnx crate passes the attacker-controlled external_data location from an ONNX model through onnx/src/tensor.rs get_external_resources and joins the value to the model directory without rejecting absolute paths or parent directory components. Loading an untrusted model through model_for_path can therefore make onnx/src/data_resolver.rs MmapDataResolver open an arbitrary local file and place the file contents into model tensors or inference output. Attacker-controlled offset and length fields can also select an out-of-range mapping slice and cause a denial of service, but the flaw does not write files or execute code. This issue is fixed in versions 0.21.17, 0.22.3, and 0.23.2.

Affected (CNA)

Vendor / product	Versions
sonos / tract	affected < 0.21.17; affected >= 0.22.0, < 0.22.3; affected >= 0.23.0, < 0.23.2

CWE

CWE-22

References

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/sonos/tract/security/advisories/GHSA-h668-6x6g-f8r5