Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
PyTorch Lightning versions up to and including 2.6.0 are affected. The LightningModule.load_from_checkpoint() method calls torch.load() without weights_only=True, so a checkpoint file that is maliciously crafted can contain arbitrary Python objects that run code when loaded. An attacker would need to get a victim to load such a checkpoint file. No fixed version is listed, and the source gives few details on workarounds.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.8 | High | 3.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0039, the 33rd percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 12 May 2026, 16:16 UTC Confirmed by NVD
- 31 Oct 2026, 14:10 UTC First seen by agentprime
- 31 Oct 2026, 14:10 UTC Confirmed by OSV