{"id":"CVE-2026-49950","summary":"Xorbits Xoscar 0.11.2 Unauthenticated Deserialization RCE via Actor Pool","details":"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.","modified":"2026-10-14T10:47:01.481808776Z","published":"2026-10-13T20:20:36.251Z","database_specific":{"cwe_ids":["CWE-502"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49950.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49950.json"},{"type":"PACKAGE","url":"https://github.com/xorbitsai/xoscar"},{"type":"WEB","url":"https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py#L99-L104"},{"type":"WEB","url":"https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx#L260"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49950"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/xorbitsai/xoscar","events":[{"introduced":"064891423f0f061d894008797fc1169227cca0b7"},{"last_affected":"ef2af816d34f3493bab9b5736fa612f78c7ef1a8"}],"database_specific":{"extracted_events":[{"introduced":"0.1.0"},{"last_affected":"0.11.2"}],"source":"AFFECTED_FIELD"}}],"versions":["v0.11.2","v0.11.1","v0.11.0","v0.10.1","v0.10.0","v0.9.12","v0.9.11","v0.9.10","v0.9.9","v0.9.8","v0.9.7","v0.9.6","v0.9.5","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.1","v0.8.0","v0.8.0.rc1","v0.7.17","v0.7.16","v0.7.15","v0.7.14","v0.7.13","v0.7.12","v0.7.11","v0.7.10","v0.7.9","v0.7.8","v0.7.7","v0.7.6","v0.7.5","v0.7.4","0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.7.0.rc1","v0.6.2","v0.6.1","v0.6.0","v0.5.0","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.1","v0.2.0","v0.1.4","v0.1.3","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49950.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}