CVE-2026-55832: Sonos Tract

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Sonos Tract: before 0.21.17 (fixed in 0.21.17); from 0.22.0, before 0.22.3 (fixed in 0.22.3); from 0.23.0, before 0.23.2 (fixed in 0.23.2)

Published 2026-09-14. Last modified 2026-09-30.