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

Quick assessment

Affected
sonos tract
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tract 是一个小巧、务实且自包含的 TensorFlow 和 ONNX 推理工具包。在 0.21.17、0.22.3 和 0.23.2 之前，tract-onnx 代码库通过 中的 函数，将 ONNX 模型中由攻击者控制的 位置参数直接传入，并将该值与模型目录进行拼接，但未拒绝绝对路径或包含父目录组件（如 ）的路径。因此，通过 加载不可信的模型时， 中的 可能会打开任意本地文件，并将该文件的内容放入模型的张量或推理输出中。攻击者控制的 （偏移量）和 （长度）字段还可以选择超出范围的内存映射切片，从而导致拒绝服务

CVSS 6.1 · Medium

Affected Version Matrix 3

VendorProduct Version RangeStatus
sonos tract < 0.21.17 affected
>= 0.22.0, < 0.22.3 affected
>= 0.23.0, < 0.23.2 affected
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I. Basic Information for CVE-2026-55832

Vulnerability Information
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Vulnerability Title
Tract: Arbitrary file read via unsanitized ONNX external_data `location` (path traversal) on model load in tract-onnx
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
sonos tract < 0.21.17 -

II. Public POCs for CVE-2026-55832

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III. Intelligence Information for CVE-2026-55832

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Patches & Fixes for CVE-2026-55832 (3)

Vendor Advisories for CVE-2026-55832 (1)

Vendor Pages for CVE-2026-55832 (2)

Other References for CVE-2026-55832 (1)

IV. Related Vulnerabilities

Same product: tract
Same vendor: sonos
Same weakness: CWE-22

V. Comments for CVE-2026-55832

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