CVE-2026-57516
Ray prior to 2.56.0 contains an unsafe deserialization vulnerability in the WebDataset reader that allows attackers to achieve remote code execution by supplying a malicious tar archive to the read_webdataset() function. The _default_decoder() function in webdataset_datasource.py unconditionally calls pickle.loads() on tar entries with .pkl/.pickle extensions and torch.load() with weights_only=False on .pt/.pth entries, executing arbitrary code inside Ray remote workers on every worker that processes the malicious archive.
- Affected products
- Ray
- Anyscale Ray
- < 2.56.0
- Fix
- Available
- CVSS 3.1
- 8.8 HIGH
- EPSS
- 0.6% (43th percentile)
- Weakness
- CWE-502
- NVD status
- Analyzed
- Published
- 2026-07-01
No indexed exploits for CVE-2026-57516 yet
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