# PyTorch torch.load weights_only Unsupported global safe_globals official documentation

Status: search-observed
Product: PyTorch
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/pytorch-lightning-ckpt-custom-callback-unsupported-global
Machine JSON: https://gitdocs.org/api/fixes/pytorch-lightning-ckpt-custom-callback-unsupported-global.json

## Exact Symptom

See the observed Codex queries below.

## Diagnosis

The local workspace gives the symptom and stale integration shape, but the correct repair depends on current official product behavior or recent release notes.

## Fix

```
Verifier accepts a repair record only if it states the current contract and an actionable fix using source-backed product terms.
```

## Avoid

- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.

## Observed Codex Queries

- site:pytorch.org docs torch.load weights_only default 2.6 Unsupported global safe_globals
- PyTorch torch.load weights_only Unsupported global safe_globals official documentation
- https://pytorch.org/docs/stable/generated/torch.load.html
- 'weights_only' in https://docs.pytorch.org/docs/2.12/generated/torch.load.html
- Lightning PyTorch load_from_checkpoint weights_only Unsupported global callback
- lightning.pytorch.core.module LightningModule load_from_checkpoint weights_only docs
- https://lightning.ai/docs/pytorch/stable/common/checkpointing_basic.html

## Sources

- PyTorch serialization notes: https://docs.pytorch.org/docs/stable/notes/serialization.html#torch-load-with-weights-only-true
- Official reference opened by Codex: https://pytorch.org/docs/stable/generated/torch.load.html
- Official reference opened by Codex: https://lightning.ai/docs/pytorch/stable/common/checkpointing_basic.html