Security Digest · Vulnerability record
CVE-2024-8019: PyTorch Lightning path traversal vulnerability
In lightning-ai/pytorch-lightning version 2.3.2, a vulnerability exists in the LightningApp when running on a Windows host.
CVSS 9.1 Critical EPSS 1.1% · p66
Should you act?
Critical and remotely reachable
No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 1.1%, percentile 66: FIRST’s model estimates a 1.1% chance of exploitation activity in the next 30 days, higher than 66% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
pytorch-lightning(PyPI) < 2.4.0, fixed in 2.4.0. Check your lockfile, including transitive dependencies.
What it is
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/uploadfile/ 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.
From the GitHub advisory
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/uploadfile/ 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 type: CWE-434.
Product: pytorch-lightning (PyPI) · Assigned by: @huntr_ai · Published: 2025-03-20
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| PyPI | pytorch-lightning | < 2.4.0 | 2.4.0 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| lightning-ai | lightning-ai/pytorch-lightning | unspecified < 2.3.3 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| @huntr_ai | 3.0 | 9.1 Critical | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| GitHub | 3.1 | 9.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable yes, technical impact partial.
- FIRST EPSS (model of 2026-10-21): 1.12% probability of exploitation activity in the next 30 days; percentile 66.
Timeline
- — CVE record last updated
- — CVE record published by @huntr_ai
- — GitHub-reviewed advisory GHSA-4cv3-v7pv-rfhf published (critical)
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- GitHub Advisory GHSA-4cv3-v7pv-rfhf github.com
- CVE.org record CVE-2024-8019 cve.org
- NVD entry CVE-2024-8019 nvd.nist.gov
Other references from the CVE record and advisory
- huntr.com huntr.com
- github.com github.com