CVE-2024-8019Public exploitNetwork attack vector

Unauthenticated arbitrary file write via crafted filename

Published Mar 20, 2025 · Updated Mar 20, 2025

Path traversal in PyTorch Lightning before 2.3.3 allows remote attackers to write or overwrite arbitrary files through LightningApp on Windows. The /api/v1/upload_file/ endpoint accepts a crafted filename without confining the destination to the intended upload directory. An unauthenticated network request is sufficient, and writing to a sensitive path enables code execution or service interruption.

CVSS severity9.1
Critical
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in PyTorch Lightning before 2.3.3 allows remote attackers to write or overwrite arbitrary files through LightningApp on Windows. The /api/v1/upload_file/ endpoint accepts a crafted filename without confining the destination to the intended upload directory. An unauthenticated network request is sufficient, and writing to a sensitive path enables code execution or service interruption.

The record

CVE
CVE-2024-8019
Published
Mar 20, 2025
Updated
Mar 20, 2025
Vendor
Lightning AI
Product
PyTorch Lightning
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <2.3.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lightning AI · PyTorch Lightningversion=unspecified <2.3.3

Published CVSS scores

9.1huntr.devCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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