GHSA-w37p-236h-pfx3

Source

https://github.com/advisories/GHSA-w37p-236h-pfx3

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-w37p-236h-pfx3/GHSA-w37p-236h-pfx3.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-w37p-236h-pfx3

Aliases

CVE-2026-44484

Published

2026-05-07T00:52:55Z

Modified

2026-05-14T21:00:21.036233877Z

Severity

9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Compromise of PyTorch Lightning PyPi Package Versions

Details

Security Advisory: Compromise of PyTorch Lightning PyPI Package Versions

Published: 2026-04-30
Last Updated: 2026-05-12

Github Advisory: CVE-2026-44484

We have identified a security incident affecting certain versions of one of our PyPI packages.

What happened

We have determined that one or more released versions of this package have been compromised and include malicious code.

Our current investigation indicates that the affected versions have introduced functionality consistent with a credential harvesting mechanism. We are still actively analysing the scope and behaviour of the code.

At this stage, the root cause of the compromise is still under investigation.

What versions are affected

We are currently working to confirm the exact set of impacted versions.

We have determined the following versions as affected and ask that you delete them from your systems:

2.6.2
2.6.3

We will update this advisory if the versions impacted by this vulnerability change.

What you should do immediately

If you have installed or are running any potentially affected versions:

Assume the environment may be compromised
Immediately rotate all credentials and secrets that may have been exposed, including:
- API keys
- Access tokens
- SSH keys
- Service account credentials
Rebuild affected systems from a known clean state
Pin PyTorch Lightning to version 2.6.1
Review logs for any suspicious or unauthorised activity

Actions we have taken

Quarantined malicious versions from PyPI
Recommend using version 2.6.1: https://github.com/Lightning-AI/pytorch-lightning/releases/tag/2.6.1
Revoked and rotated all internal credentials associated with our release process
Initiated a full investigation into the compromise

Ongoing investigation

We are actively working to:

Identify the exact mechanism of compromise
Confirm the full set of affected versions
Determine the behaviour and impact of the malicious code
Assess any downstream impact to users

We will provide updates as soon as more information becomes available.

Commitment to transparency

We take the security of our users and the integrity of our software supply chain extremely seriously.

We will continue to share timely and accurate updates as our investigation progresses.

Contact

If you have questions or believe you may be impacted, please contact us at:

security@lightning.ai

Database specific

{
    "cwe_ids": [
        "CWE-506"
    ],
    "nvd_published_at": "2026-05-14T15:16:48Z",
    "github_reviewed": true,
    "severity": "CRITICAL",
    "github_reviewed_at": "2026-05-07T00:52:55Z"
}

References

Affected packages

PyPI / pytorch-lightning

Package

Name: pytorch-lightning; View open source insights on deps.dev
Purl: pkg:pypi/pytorch-lightning

Affected ranges

Affected versions

2.*

2.6.2

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-w37p-236h-pfx3/GHSA-w37p-236h-pfx3.json"