{"schema":"threatline.record/2","record":{"id":"CVE-2026-49950","aliases":[],"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.","categories":["Unclassified"],"product":"xoscar","vendor":"xorbitsai","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-49950","source_modified_at":"2026-10-16T14:30:16.304Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"xoscar","vendor":"xorbitsai","versions":[{"status":"affected","version":"0.1.0","versionType":"semver","lessThanOrEqual":"0.11.2"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":9.3,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00631,"percentile":0.49644,"score_date":"2026-10-23"},"published_at":"2026-10-13T20:20:36.251Z","modified_at":"2026-10-16T14:30:16.304Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-49950","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-16T14:30:16.304Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-49950","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx#L260"},{"source":"CVE List","url":"https://github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py#L99-L104"},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rce","tags":["exploit","technical-description"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-14T17:00:37.058721Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-16T14:30:16.304Z","content_hash":"7f5d35b8cfae4a147c7928f622f8e1ba6a503474defcc2fd131705270f9b017c"}}