Arbitrary file read via unsanitized model path
Published Sep 14, 2026 · Updated Sep 14, 2026
Path traversal in Sonos tract-onnx affected releases allows context-dependent attackers to read local files via malicious ONNX models. get_external_resources joins the model-controlled external_data location to the model directory without rejecting absolute paths or parent components, and MmapDataResolver maps the resulting file into model tensors. Exploitation requires an application using a release before 0.21.17, 0.22.0 through 0.22.2, or 0.23.0 through 0.23.1 to load an untrusted model; crafted offsets can also trigger a panic, but the flaw neither writes files nor executes code.
Summary
What happened
Path traversal in Sonos tract-onnx affected releases allows context-dependent attackers to read local files via malicious ONNX models. get_external_resources joins the model-controlled external_data location to the model directory without rejecting absolute paths or parent components, and MmapDataResolver maps the resulting file into model tensors. Exploitation requires an application using a release before 0.21.17, 0.22.0 through 0.22.2, or 0.23.0 through 0.23.1 to load an untrusted model; crafted offsets can also trigger a panic, but the flaw neither writes files nor executes code.
The record
- CVE
- CVE-2026-55832
- Published
- Sep 14, 2026
- Updated
- Sep 14, 2026
- Vendor
- Sonos
- Product
- tract
- Classifications
- CWE-22, T1005
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 14, 2026CVE publishedPublication date reported by the CVE source.
- Sep 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.21.17
- Affected versionversion=>= 0.22.0, < 0.22.3
- Affected versionversion=>= 0.23.0, < 0.23.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Malicious ONNX external_data model proof of conceptproof of concept · demonstrated
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Technologies
Your stack
See the directory against your own environment.
Your stack
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