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CVE-2026-58659— PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter

Quick assessment

Affected
Lightning-AI pytorch-lightning
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lightning AI PyTorch Lightning是美国Lightning AI公司的一款深度学习模型训练框架。 Lightning-AI pytorch-lightning 2.6.5及之前版本存在代码注入漏洞，该漏洞源于_load_state函数会从检查点_instantiator超参数中导入并执行攻击者控制的模块名，导致容易受到远程代码执行攻击。攻击者可以特制恶意检查点文件，绕过weights_only=True保护，在调用LightningModule.load_from_checkpo

CVSS 7.8 · High EPSS 0.33% · P25

Affected Version Matrix 2

VendorProduct Version RangeStatus
Lightning-AI pytorch-lightning ≤ 2.6.5 affected
d710d689510d50e800f53b3cd773cbca20b1f86f unaffected
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I. Basic Information for CVE-2026-58659

Vulnerability Information
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Vulnerability Title
PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter
Source: CVE Program / CVE List V5
Vulnerability Description
PyTorch Lightning through 2.6.5, fixed in commit d710d68, contains a remote code execution vulnerability in the _load_state function that imports and executes attacker-controlled module names from checkpoint _instantiator hyperparameters. Attackers can craft malicious checkpoint files that bypass weights_only=True protections to execute arbitrary code when LightningModule.load_from_checkpoint is called.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部可控制的输入来选择类或代码(不安全的反射)
Source: CVE Program / CVE List V5
Vulnerability Title
Lightning AI PyTorch Lightning 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lightning AI PyTorch Lightning是美国Lightning AI公司的一款深度学习模型训练框架。 Lightning-AI pytorch-lightning 2.6.5及之前版本存在代码注入漏洞，该漏洞源于_load_state函数会从检查点_instantiator超参数中导入并执行攻击者控制的模块名，导致容易受到远程代码执行攻击。攻击者可以特制恶意检查点文件，绕过weights_only=True保护，在调用LightningModule.load_from_checkpo
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
Lightning-AI pytorch-lightning 0 ~ 2.6.5 -

II. Public POCs for CVE-2026-58659

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8092 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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POC zip download
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III. Intelligence Information for CVE-2026-58659

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Patches & Fixes for CVE-2026-58659 (2)

Vendor Advisories for CVE-2026-58659 (1)

Other References for CVE-2026-58659 (1)

IV. Related Vulnerabilities

Same product: pytorch-lightning
Same vendor: Lightning-AI
Same weakness: CWE-470

V. Comments for CVE-2026-58659

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