{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57516", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-06-24T15:58:58.537Z", "datePublished": "2026-07-01T16:36:55.765Z", "dateUpdated": "2026-07-01T17:53:07.907Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-07-01T16:41:13.639Z"}, "title": "Ray < 2.56.0 Unsafe Deserialization RCE via WebDataset Reader", "descriptions": [{"lang": "en", "value": "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."}], "tags": ["x_open-source"], "datePublic": "2026-05-18T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-502", "description": "Deserialization of Untrusted Data", "type": "CWE"}]}], "affected": [{"defaultStatus": "affected", "vendor": "Anyscale, Inc", "product": "Ray", "repo": "https://github.com/ray-project/ray", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThan": "2.56.0"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.6, "vectorString": "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"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}}], "references": [{"url": "https://github.com/ray-project/ray/releases/tag/ray-2.56.0", "name": "Release Notes", "tags": ["release-notes"]}, {"url": "https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43", "name": "GitHub Security Advisory (GHSA-hhrp-gw25-jr43)", "tags": ["vendor-advisory"]}, {"url": "https://github.com/ray-project/ray/pull/63469", "name": "Fix PR (1)", "tags": ["patch", "issue-tracking"]}, {"url": "https://github.com/ray-project/ray/pull/63470", "name": "Fix PR (2)", "tags": ["patch", "issue-tracking"]}, {"url": "https://www.vulncheck.com/advisories/ray-unsafe-deserialization-rce-via-webdataset-reader", "tags": ["third-party-advisory"]}], "credits": [{"lang": "en", "value": "jeremysommerfeld8910-cpu", "type": "finder"}, {"lang": "en", "value": "shakevsky", "type": "reporter"}, {"lang": "en", "value": "alexchenai", "type": "reporter"}, {"lang": "en", "value": "SSJCorpSec", "type": "reporter"}, {"lang": "en", "value": "thesecguy45", "type": "reporter"}, {"lang": "en", "value": "sfwani", "type": "reporter"}, {"lang": "en", "value": "Rahul Karne", "type": "reporter"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "vulncheck"}}, "adp": [{"references": [{"url": "https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-01T17:53:01.380220Z", "id": "CVE-2026-57516", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-01T17:53:07.907Z"}}]}}

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