{"cve":{"cve_id":"CVE-2026-57516","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00858,"epss_percentile":0.55784,"epss_as_of":"2026-08-26","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.","published_at":"2026-07-01T16:36:55.765000Z","last_modified_at":"2026-07-14T22:17:23.287000Z","cvss_v3_score":8.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":8.6,"cvss_v4_vector":"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_v4_severity":"HIGH","ssvc_decision":null,"ssvc_exploitation":"poc","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-502"],"nvd_references":["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://github.com/ray-project/ray/pull/63469","https://github.com/ray-project/ray/pull/63470","https://www.vulncheck.com/advisories/ray-unsafe-deserialization-rce-via-webdataset-reader"],"vuln_status":"Analyzed","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-07-01T19:23:34.989048Z","updated_at":"2026-07-15T16:30:08.798535Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"A","value_label":"Active"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"H","value_label":"High"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"H","value_label":"High"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"H","value_label":"High"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"anyscale","vendor_name":"anyscale","product_slug":"ray","product_name":"ray","version_start":null,"version_start_inclusive":null,"version_end":"2.56.0","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:anyscale:ray:*:*:*:*:*:*:*:*"},{"vendor_slug":"anyscale-inc","vendor_name":"Anyscale, Inc","product_slug":"ray","product_name":"Ray","version_start":"0","version_start_inclusive":true,"version_end":"2.56.0","version_end_inclusive":false,"cpe23_uri":"cve5:anyscale-inc:ray:0:2.56.0"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.56.0","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/ray-project/ray/security/advisories/GHSA-hhrp-gw25-jr43","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/ray-project/ray/pull/63469","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/ray-project/ray/pull/63470","source_type":"PATCH","tags":["patch"]},{"url":"https://www.vulncheck.com/advisories/ray-unsafe-deserialization-rce-via-webdataset-reader","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2026-07-01T16:36:55.765000Z","label":"CVE published","source":null}]}