CVE-2024-8019 Arbitrary File Write/Overwrite in lightning-ai/pytorch-lightning

What is CVE-2024-8019?

CVE-2024-8019 is a critical vulnerability in lightning-ai/pytorch-lightning, published on 20 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In lightning-ai/pytorch-lightning version 2.3.2, a vulnerability exists in the `LightningApp` when running on a Windows host. The vulnerability occurs at the `/api/v1/upload_file/` endpoint, allowing an attacker to write or overwrite arbitrary files by providing a crafted filename. This can lead to potential remote code execution (RCE) by overwriting critical files or placing malicious files in sensitive locations.

Weakness: CWE-434

Which versions are affected by CVE-2024-8019?

4 open source packages ship an affected version, including pytorch-lightning and lightning. It affects 1 product.

Products include Lightningai Pytorch Lightning.

How do I fix CVE-2024-8019?

Upgrade pytorch-lightning to 2.4.0 or later.

Is CVE-2024-8019 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-8019 exists.

Other vulnerabilities in lightning-ai/pytorch-lightning

• CVE-2024-5452 RCE via Property/Class Pollution in lightning-ai/pytorch-lightning Critical 9.8
• CVE-2026-44484 Compromise of PyTorch Lightning PyPi Package Versions Critical 9.3
• CVE-2024-5980 Arbitrary File Write via /v1/runs API endpoint in lightning-ai/pytorch-lightning Critical 9.1
• CVE-2026-31221 PyTorch Lightning load_from_checkpoint has an insecure checkpoint deserialization High 8.8
• CVE-2026-58659 PyTorch Lightning Arbitrary Code Execution via _instantiator Hyperparameter High 8.4

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-4cv3-v7pv-rfhf, PYSEC-2026-3970, PYSEC-2026-507.