CVE-2026-57516

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Source
https://cve.org/CVERecord?id=CVE-2026-57516
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57516.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-57516
Aliases
Downstream
Published
2026-07-01T16:36:55.765Z
Modified
2026-08-05T03:32:21.445459915Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Ray < 2.56.0 Unsafe Deserialization RCE via WebDataset Reader
Details

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 readwebdataset() function. The defaultdecoder() function in webdatasetdatasource.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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57516.json",
    "cwe_ids": [
        "CWE-502"
    ]
}
References

Affected packages

Git / github.com/ray-project/ray

Affected ranges

Type
GIT
Repo
https://github.com/ray-project/ray
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
637fd062205393b9e1929996bfe1d49bd3f8469d
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:anyscale:ray:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.56.0"
        }
    ]
}

Affected versions

ray-0.*
ray-0.1.0
ray-0.1.1
ray-0.1.2
ray-0.2.0
ray-0.2.1
ray-0.2.2
ray-0.3.0
ray-0.3.1
ray-0.4.0
ray-0.5.0
ray-0.5.1
ray-0.5.2
ray-0.5.3
ray-0.6.0
ray-0.6.1
ray-0.6.2
ray-0.6.3
ray-0.6.4
ray-0.6.5
ray-0.7.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57516.json"