CVE-2024-8019 — Vulnerability in lightning — CVE Details

CRITICAL

PyTorch Lightning path traversal vulnerability

Published September 10, 2026Updated September 10, 2026Source: osv

Summary

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.

Advisory Timeline

First published September 10, 2026 (32 days ago).
Last revised September 10, 2026 — 0 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip

Update lightning to 2.4.0 or later

pip install "lightning>=2.4.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

Package	Ecosystem	Affected	Fixed In
lightning	pypi	0.0.2, 0.10.0, 0.2, 0.2.2 (+231 more)	2.4.0

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.1 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References

Frequently Asked Questions

What is CVE-2024-8019?: PyTorch Lightning path traversal vulnerability This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.1/10).
How do I check if my project is affected by CVE-2024-8019?: CVE-2024-8019 affects lightning. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2024-8019 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.1

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

PYSEC-2026-3970

GHSA-4cv3-v7pv-rfhf

PYSEC-2026-507

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