Code execution via unrestricted checkpoint deserialization
Published Sep 13, 2026 · Updated Sep 13, 2026
Unsafe deserialization in ESPnet before 202609 allows attackers to execute arbitrary code by supplying a malicious model checkpoint. Initialization and fine-tuning paths pass checkpoint data to torch.load with weights_only=False, enabling pickle objects to invoke executable code during loading. The checkpoint must be introduced into a workflow and loaded; execution then occurs with the privileges of the ESPnet process.
Summary
What happened
Unsafe deserialization in ESPnet before 202609 allows attackers to execute arbitrary code by supplying a malicious model checkpoint. Initialization and fine-tuning paths pass checkpoint data to torch.load with weights_only=False, enabling pickle objects to invoke executable code during loading. The checkpoint must be introduced into a workflow and loaded; execution then occurs with the privileges of the ESPnet process.
The record
- CVE
- CVE-2026-90777
- Published
- Sep 13, 2026
- Updated
- Sep 13, 2026
- Vendor
- ESPnet
- Product
- ESPnet
- Classifications
- T1204.002
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 13, 2026CVE publishedPublication date reported by the CVE source.
- Sep 13, 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?
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- Affected versionversion=0 <202609
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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