{"id":"CVE-2026-49950","revision":"a0b7128a418e4c0895daa69055f656e0","records":[{"revision":"a0b7128a418e4c0895daa69055f656e0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-49950","aliases":[],"title":"Xorbits Xoscar 0.11.2 Unauthenticated Deserialization RCE via Actor Pool","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.","state":0,"publishedAt":"2026-10-13T20:20:36.251+00:00","modifiedAt":"2026-10-16T14:30:16.304+00:00","affected":[{"ecosystem":"Vendor product","name":"xoscar","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"vendor\": \"xorbitsai\",\n                    \"product\": \"xoscar\",\n                    \"packageURL\": \"pkg:github/xorbitsai/xoscar\",\n                    \"repo\": \"https://github.com/xorbitsai/xoscar\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0.1.0\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"0.11.2\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx#L260","https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py#L99-L104","https://www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool","https://www.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rce"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-49950","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-49950","identifiers":["CVE-2026-49950"]},"retained":false,"historicalAffected":[]}],"coverage":[]}