{"schemaVersion":1,"id":"CVE-2026-49950","requestedId":"CVE-2026-49950","aliases":[],"status":"published","rawState":"Received","rawSeverityStatus":"Received","duplicateOf":null,"indexable":true,"title":null,"description":"Xorbits Xoscar through 0.11.2 contains an unauthenticated deserialization vulnerability that allows remote attackers to execute arbitrary code by sending crafted data over the actor-pool TCP channel. Attackers can exploit SocketChannel.recv() passing unvalidated data to cloudpickle.loads(), which triggers pickle __reduce__ gadget execution before message type validation, achieving remote code execution as the server process which commonly runs as root on GPU nodes.","dates":{"published":"2026-10-13T20:20:36.251Z","modified":"2026-10-14T17:00:51.052Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"cve.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"cve.org","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"cve.org","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"nvd","score":9.3,"severity":"critical","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"nvd","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00625,"percentile":0.48727,"severity":"low","asOf":"2026-10-14T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-14T00:00:00.000Z","score":0.00625,"percentile":0.48727}],"last30":[{"date":"2026-10-14T00:00:00.000Z","score":0.00625,"percentile":0.48727}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","evidence":[]},"exploits":[],"exploitCount":0,"exploitSources":[],"weaknesses":[{"id":"CWE-502","name":"Deserialization of Untrusted Data","description":"The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/502.html","capec":[{"id":"CAPEC-586","name":"Object Injection","url":"https://capec.mitre.org/data/definitions/586.html"}],"techniques":[],"countermeasures":[]}],"ttp":{"capecs":[{"id":"CAPEC-586","name":"Object Injection","url":"https://capec.mitre.org/data/definitions/586.html","weaknessIds":["CWE-502"],"techniqueIds":[]}],"techniques":[],"countermeasures":[],"countermeasuresByTactic":[]},"affected":[{"vendor":"xorbitsai","product":"xoscar","name":"xoscar","label":"xoscar","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"source":null,"versions":[{"text":"≥ 0.1.0, ≤ 0.11.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.1.0, ≤ 0.11.2","eol":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx#L260","label":"github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx","hostname":"github.com","tags":[],"sources":["cve.org","nvd"]},{"url":"https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py#L99-L104","label":"github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py","hostname":"github.com","tags":[],"sources":["cve.org","nvd"]},{"url":"https://www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool","label":"www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool","hostname":"www.vulncheck.com","tags":["Third Party Advisory"],"sources":["cve.org","nvd"]}],"droppedReferenceCount":0,"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-13T20:20:36.251Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-14T17:00:51.052Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"default","profileName":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10},"appliedRules":["high-cvss-alone"]},"warnings":[],"meta":{"dataAsOf":"2026-10-14T23:33:47.766Z","stale":false,"partial":false}}