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    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.

    Published:Jul 1, 2026
    Last Modified:Jul 14, 2026
    EPS:Jul 1, 2026
    EPSS Score:0.00493
    CVSS Score:8.8

    Affected Products

    Vendor
    Anyscale
    Product
    Ray

    Exploits

    https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-586 Object Injection

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High