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CVE-2026-1839— Arbitrary Code Execution via Unsafe torch.load() in Trainer Checkpoint Loading in huggingface/transformers

Quick assessment

Affected
huggingface huggingface/transformers
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.

Hugging Face Transformers是Hugging Face开源的一个用于定义最先进机器学习模型的框架，涵盖文本、视觉、音频和多模态模型，可用于推理和训练。 Hugging Face Transformers存在安全漏洞，该漏洞源于Trainer类的_load_rng_state方法调用torch.load时未设置weights_only参数，可能导致攻击者通过恶意检查点文件执行任意代码。

AI Predicted 9.8 Difficulty: Easy EPSS 0.35% · P28
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I. Basic Information for CVE-2026-1839

Vulnerability Information
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Vulnerability Title
Arbitrary Code Execution via Unsafe torch.load() in Trainer Checkpoint Loading in huggingface/transformers
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the HuggingFace Transformers library, specifically in the `Trainer` class, allows for arbitrary code execution. The `_load_rng_state()` method in `src/transformers/trainer.py` at line 3059 calls `torch.load()` without the `weights_only=True` parameter. This issue affects all versions of the library supporting `torch>=2.2` when used with PyTorch versions below 2.6, as the `safe_globals()` context manager provides no protection in these versions. An attacker can exploit this vulnerability by supplying a malicious checkpoint file, such as `rng_state.pth`, which can execute arbitrary code when loaded. The issue is resolved in version v5.0.0rc3.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
Hugging Face Transformers 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hugging Face Transformers是Hugging Face开源的一个用于定义最先进机器学习模型的框架，涵盖文本、视觉、音频和多模态模型，可用于推理和训练。 Hugging Face Transformers存在安全漏洞，该漏洞源于Trainer类的_load_rng_state方法调用torch.load时未设置weights_only参数，可能导致攻击者通过恶意检查点文件执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
huggingface huggingface/transformers unspecified ~ v5.0.0rc3 -

II. Public POCs for CVE-2026-1839

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III. Intelligence Information for CVE-2026-1839

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Vendor Advisories for CVE-2026-1839 (1)

IV. Related Vulnerabilities

Same product: huggingface/transformers
Same vendor: huggingface
Same weakness: CWE-502

V. Comments for CVE-2026-1839

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