Critical severity · published May 14, 2026
CVE-2026-44484
Compromise of PyTorch Lightning PyPi Package Versions
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
PyTorch Lightning is a deep learning framework to pretrain and finetune AI models. Versions 2.6.2 and 2.6.2 have introduced functionality consistent with a credential harvesting mechanism.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PY
pytorch-lightning · Lightning-AI
2.6.2; 2.6.3 · source: vendor
PL
Pytorch Lightning · Lightningai
2.6.2; 2.6.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44484
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44484
Mitigation
https://github.com/Lightning-AI/pytorch-lightning/security/advisories/GHSA-w37p-236h-pfx3
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-44484
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2477476
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44484.json
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