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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-49950 ↗
- github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/backends/communication/socket.py ↗
- github.com/xorbitsai/xoscar/blob/v0.11.2/python/xoscar/serialization/core.pyx ↗
- www.vulncheck.com/advisories/xorbits-xoscar-unauthenticated-deserialization-rce-via-actor-pool ↗
- www.vulncheck.com/blog/xorbits-xoscar-unauth-cloudpickle-rce ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.