Path Traversal in Sonos Tract

CVE-2026-55832

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.

Vulnerability class: Path Traversal (Directory Traversal)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L.

EPSS exploit prediction

EPSS: 0.002 (9.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-55832: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • Sonos Tract — versions < 0.21.17, >= 0.22.0, < 0.22.3, >= 0.23.0, < 0.23.2

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-55832?
CVE-2026-55832 is a medium-severity vulnerability in Sonos Tract, classified under Path Traversal. CVSS score: 6.1/10. Published 2026-09-14.
How severe is CVE-2026-55832?
Medium severity. CVSS v3 base score is 6.1 out of 10.