Deserialization of Untrusted Data Affecting torch package, versions [,2.6.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PYTHON-TORCH-9788071
- published20 Apr 2025
- disclosed18 Apr 2025
- creditJi'an Zhou
Introduced: 18 Apr 2025
NewCVE-2025-32434 (opens in a new tab)How to fix?
Upgrade torch to version 2.6.0 or higher.
Overview
torch is a Tensors and Dynamic neural networks in Python with strong GPU acceleration
Affected versions of this package are vulnerable to Deserialization of Untrusted Data when using the torch.load() function on an untrusted model with weights_only=True, which is documented to be secure. (The documentation does note that "Loading un-trusted checkpoint with weights_only=False MUST never be done.") An attacker can cause the contents of a malicious .tar file to be loaded and executed by forcing the use of the legacy_load() function.
Details
Serialization is a process of converting an object into a sequence of bytes which can be persisted to a disk or database or can be sent through streams. The reverse process of creating object from sequence of bytes is called deserialization. Serialization is commonly used for communication (sharing objects between multiple hosts) and persistence (store the object state in a file or a database). It is an integral part of popular protocols like Remote Method Invocation (RMI), Java Management Extension (JMX), Java Messaging System (JMS), Action Message Format (AMF), Java Server Faces (JSF) ViewState, etc.
Deserialization of untrusted data (CWE-502) is when the application deserializes untrusted data without sufficiently verifying that the resulting data will be valid, thus allowing the attacker to control the state or the flow of the execution.