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// vulnerability record
cached · NVD via COSMOS syncCVE-2026-57516
HIGHpublished 2026-07-01 17:16 UTC · 3 days ago · modified 2026-07-02 18:01 UTC
8.6
CVSS / 10
// description
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.
// weaknesses (CWE)
- CWE-502
// references (5)
- https://github.com/ray-project/ray/pull/63469
- https://github.com/ray-project/ray/pull/63470
- https://github.com/ray-project/ray/releases/tag/ray-2.56.0
- https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43
- https://www.vulncheck.com/advisories/ray-unsafe-deserialization-rce-via-webdataset-reader